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ID

VDE-2019-009

Published

2019-06-04 12:22 (CEST)

Last update

2021-11-04 15:42 (CET)

Vendor(s)

PHOENIX CONTACT GmbH & Co. KG

Product(s)

Article No┬░ Product Name Affected Version(s)
2404267 AXC F 2152 = 1.x
1046568 AXC F 2152 (Starterkit) = 1.x

Summary

Multiple vulnerabilities have been identified in PHOENIX CONTACT AXC F 2152 with firmware versions 1.x

Vulnerabilities



Last Update
Feb. 18, 2020, 8:43 a.m.
Weakness
Integer Overflow or Wraparound (CWE-190)
Summary
The NTLM authentication feature in curl and libcurl before 7.57.0 on 32-bit platforms allows attackers to cause a denial of service (integer overflow and resultant buffer overflow, and application crash) or possibly have unspecified other impact via vectors involving long user and password fields.
Last Update
Feb. 18, 2020, 8:42 a.m.
Weakness
Out-of-bounds Read (CWE-125)
Summary
The verify_certificate function in lib/vtls/schannel.c in libcurl 7.30.0 through 7.51.0, when built for Windows CE using the schannel TLS backend, allows remote attackers to obtain sensitive information, cause a denial of service (crash), or possibly have unspecified other impact via a wildcard certificate name, which triggers an out-of-bounds read.
Last Update
Feb. 18, 2020, 8:43 a.m.
Weakness
Out-of-bounds Read (CWE-125)
Summary
The FTP wildcard function in curl and libcurl before 7.57.0 allows remote attackers to cause a denial of service (out-of-bounds read and application crash) or possibly have unspecified other impact via a string that ends with an '[' character.
Last Update
Feb. 18, 2020, 8:43 a.m.
Weakness
Out-of-bounds Read (CWE-125)
Summary
tcpdump 4.9.0 has a heap-based buffer over-read in the lldp_print function in print-lldp.c, related to util-print.c.
Last Update
Feb. 18, 2020, 8:43 a.m.
Weakness
Out-of-bounds Read (CWE-125)
Summary
tcpdump 4.9.0 has a heap-based buffer over-read in the pimv1_print function in print-pim.c.
Last Update
Feb. 18, 2020, 8:43 a.m.
Weakness
Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119)
Summary
tcpdump 4.9.0 has a buffer overflow in the sliplink_print function in print-sl.c.
Last Update
Feb. 18, 2020, 8:43 a.m.
Weakness
Double Free (CWE-415)
Summary
Double free vulnerability in the gnutls_x509_ext_import_proxy function in GnuTLS before 3.3.26 and 3.5.x before 3.5.8 allows remote attackers to have unspecified impact via crafted policy language information in an X.509 certificate with a Proxy Certificate Information extension.
Last Update
Feb. 18, 2020, 8:43 a.m.
Weakness
Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119)
Summary
Stack-based buffer overflow in the cdk_pk_get_keyid function in lib/opencdk/pubkey.c in GnuTLS before 3.3.26 and 3.5.x before 3.5.8 allows remote attackers to have unspecified impact via a crafted OpenPGP certificate.
Last Update
Feb. 18, 2020, 8:42 a.m.
Weakness
Numeric Errors (CWE-189)
Summary
inffast.c in zlib 1.2.8 might allow context-dependent attackers to have unspecified impact by leveraging improper pointer arithmetic.
Last Update
Feb. 18, 2020, 8:43 a.m.
Weakness
Out-of-bounds Write (CWE-787)
Summary
A buffer overflow exists in curl 7.12.3 to and including curl 7.58.0 in the FTP URL handling that allows an attacker to cause a denial of service or worse.
Last Update
Feb. 18, 2020, 8:43 a.m.
Weakness
Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119)
Summary
Multiple heap-based buffer overflows in the read_attribute function in GnuTLS before 3.3.26 and 3.5.x before 3.5.8 allow remote attackers to have unspecified impact via a crafted OpenPGP certificate.
Last Update
Feb. 18, 2020, 8:42 a.m.
Weakness
Numeric Errors (CWE-189)
Summary
The crc32_big function in crc32.c in zlib 1.2.8 might allow context-dependent attackers to have unspecified impact via vectors involving big-endian CRC calculation.
Last Update
Feb. 18, 2020, 8:43 a.m.
Weakness
Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119)
Summary
An IMAP FETCH response line indicates the size of the returned data, in number of bytes. When that response says the data is zero bytes, libcurl would pass on that (non-existing) data with a pointer and the size (zero) to the deliver-data function. libcurl's deliver-data function treats zero as a magic number and invokes strlen() on the data to figure out the length. The strlen() is called on a heap based buffer that might not be zero terminated so libcurl might read beyond the end of it into whatever memory lies after (or just crash) and then deliver that to the application as if it was actually downloaded.
Last Update
Feb. 18, 2020, 8:44 a.m.
Weakness
Out-of-bounds Read (CWE-125)
Summary
A buffer over-read exists in curl 7.20.0 to and including curl 7.58.0 in the RTSP+RTP handling code that allows an attacker to cause a denial of service or information leakage
Last Update
Feb. 18, 2020, 8:44 a.m.
Weakness
Out-of-bounds Read (CWE-125)
Summary
curl version curl 7.20.0 to and including curl 7.59.0 contains a CWE-126: Buffer Over-read vulnerability in denial of service that can result in curl can be tricked into reading data beyond the end of a heap based buffer used to store downloaded RTSP content.. This vulnerability appears to have been fixed in curl < 7.20.0 and curl >= 7.60.0.
Last Update
Feb. 18, 2020, 8:43 a.m.
Weakness
Out-of-bounds Read (CWE-125)
Summary
libcurl 7.49.0 to and including 7.57.0 contains an out bounds read in code handling HTTP/2 trailers. It was reported (https://github.com/curl/curl/pull/2231) that reading an HTTP/2 trailer could mess up future trailers since the stored size was one byte less than required. The problem is that the code that creates HTTP/1-like headers from the HTTP/2 trailer data once appended a string like `:` to the target buffer, while this was recently changed to `: ` (a space was added after the colon) but the following math wasn't updated correspondingly. When accessed, the data is read out of bounds and causes either a crash or that the (too large) data gets passed to client write. This could lead to a denial-of-service situation or an information disclosure if someone has a service that echoes back or uses the trailers for something.
Last Update
Feb. 18, 2020, 8:42 a.m.
Weakness
Numeric Errors (CWE-189)
Summary
The inflateMark function in inflate.c in zlib 1.2.8 might allow context-dependent attackers to have unspecified impact via vectors involving left shifts of negative integers.
Last Update
Feb. 18, 2020, 8:42 a.m.
Weakness
Numeric Errors (CWE-189)
Summary
inftrees.c in zlib 1.2.8 might allow context-dependent attackers to have unspecified impact by leveraging improper pointer arithmetic.
Last Update
Feb. 18, 2020, 8:42 a.m.
Weakness
Improper Certificate Validation (CWE-295)
Summary
The verify_certificate function in lib/vtls/schannel.c in libcurl 7.30.0 through 7.51.0, when built for Windows CE using the schannel TLS backend, makes it easier for remote attackers to conduct man-in-the-middle attacks via a crafted wildcard SAN in a server certificate, as demonstrated by "*.com."
Last Update
Feb. 18, 2020, 8:42 a.m.
Weakness
Improper Link Resolution Before File Access ('Link Following') (CWE-59)
Summary
The nginx package before 1.6.2-5+deb8u3 on Debian jessie, the nginx packages before 1.4.6-1ubuntu3.6 on Ubuntu 14.04 LTS, before 1.10.0-0ubuntu0.16.04.3 on Ubuntu 16.04 LTS, and before 1.10.1-0ubuntu1.1 on Ubuntu 16.10, and the nginx ebuild before 1.10.2-r3 on Gentoo allow local users with access to the web server user account to gain root privileges via a symlink attack on the error log.
Last Update
Feb. 18, 2020, 8:43 a.m.
Weakness
Loop with Unreachable Exit Condition ('Infinite Loop') (CWE-835)
Summary
The ASN.1 parser in strongSwan before 5.5.3 improperly handles CHOICE types when the x509 plugin is enabled, which allows remote attackers to cause a denial of service (infinite loop) via a crafted certificate.
Last Update
Feb. 18, 2020, 8:42 a.m.
Weakness
Resource Management Errors (CWE-399)
Summary
The recv_and_process_client_pkt function in networking/ntpd.c in busybox allows remote attackers to cause a denial of service (CPU and bandwidth consumption) via a forged NTP packet, which triggers a communication loop.
Last Update
Feb. 18, 2020, 8:42 a.m.
Weakness
Improper Authentication (CWE-287)
Summary
curl and libcurl before 7.50.2, when built with NSS and the libnsspem.so library is available at runtime, allow remote attackers to hijack the authentication of a TLS connection by leveraging reuse of a previously loaded client certificate from file for a connection for which no certificate has been set, a different vulnerability than CVE-2016-5420.
Last Update
Feb. 18, 2020, 8:42 a.m.
Weakness
Permissions, Privileges, and Access Controls (CWE-264)
Summary
The gnutls_ocsp_resp_check_crt function in lib/x509/ocsp.c in GnuTLS before 3.4.15 and 3.5.x before 3.5.4 does not verify the serial length of an OCSP response, which might allow remote attackers to bypass an intended certificate validation mechanism via vectors involving trailing bytes left by gnutls_malloc.
Last Update
Feb. 18, 2020, 8:44 a.m.
Weakness
NULL Pointer Dereference (CWE-476)
Summary
A NULL pointer dereference exists in curl 7.21.0 to and including curl 7.58.0 in the LDAP code that allows an attacker to cause a denial of service
Last Update
Feb. 18, 2020, 8:43 a.m.
Weakness
Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119)
Summary
libcurl may read outside of a heap allocated buffer when doing FTP. When libcurl connects to an FTP server and successfully logs in (anonymous or not), it asks the server for the current directory with the `PWD` command. The server then responds with a 257 response containing the path, inside double quotes. The returned path name is then kept by libcurl for subsequent uses. Due to a flaw in the string parser for this directory name, a directory name passed like this but without a closing double quote would lead to libcurl not adding a trailing NUL byte to the buffer holding the name. When libcurl would then later access the string, it could read beyond the allocated heap buffer and crash or wrongly access data beyond the buffer, thinking it was part of the path. A malicious server could abuse this fact and effectively prevent libcurl-based clients to work with it - the PWD command is always issued on new FTP connections and the mistake has a high chance of causing a segfault. The simple fact that this has issue remained undiscovered for this long could suggest that malformed PWD responses are rare in benign servers. We are not aware of any exploit of this flaw. This bug was introduced in commit [415d2e7cb7](https://github.com/curl/curl/commit/415d2e7cb7), March 2005. In libcurl version 7.56.0, the parser always zero terminates the string but also rejects it if not terminated properly with a final double quote.
Last Update
Feb. 18, 2020, 8:43 a.m.
Weakness
Out-of-bounds Read (CWE-125)
Summary
tcpdump 4.9.0 allows remote attackers to cause a denial of service (heap-based buffer over-read and application crash) via crafted packet data. The crash occurs in the EXTRACT_16BITS function, called from the stp_print function for the Spanning Tree Protocol.
Last Update
Feb. 18, 2020, 8:43 a.m.
Weakness
NULL Pointer Dereference (CWE-476)
Summary
The gmp plugin in strongSwan before 5.6.0 allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted RSA signature.
Last Update
Feb. 18, 2020, 8:43 a.m.
Weakness
Out-of-bounds Read (CWE-125)
Summary
If an SSL/TLS server or client is running on a 32-bit host, and a specific cipher is being used, then a truncated packet can cause that server or client to perform an out-of-bounds read, usually resulting in a crash. For OpenSSL 1.1.0, the crash can be triggered when using CHACHA20/POLY1305; users should upgrade to 1.1.0d. For Openssl 1.0.2, the crash can be triggered when using RC4-MD5; users who have not disabled that algorithm should update to 1.0.2k.
Last Update
Feb. 18, 2020, 8:43 a.m.
Weakness
Loop with Unreachable Exit Condition ('Infinite Loop') (CWE-835)
Summary
XML External Entity vulnerability in libexpat 2.2.0 and earlier (Expat XML Parser Library) allows attackers to put the parser in an infinite loop using a malformed external entity definition from an external DTD.
Last Update
Feb. 18, 2020, 8:43 a.m.
Weakness
Out-of-bounds Read (CWE-125)
Summary
The stream reading functions in lib/opencdk/read-packet.c in GnuTLS before 3.3.26 and 3.5.x before 3.5.8 allow remote attackers to cause a denial of service (out-of-memory error and crash) via a crafted OpenPGP certificate.
Last Update
Feb. 18, 2020, 8:43 a.m.
Weakness
Improper Input Validation (CWE-20)
Summary
The gmp plugin in strongSwan before 5.5.3 does not properly validate RSA public keys before calling mpz_powm_sec, which allows remote peers to cause a denial of service (floating point exception and process crash) via a crafted certificate.
Last Update
Feb. 18, 2020, 8:58 a.m.
Weakness
Improper Authentication (CWE-287)
Summary
An issue was discovered on Phoenix Contact AXC F 2152 (No.2404267) before 2019.0 LTS and AXC F 2152 STARTERKIT (No.1046568) before 2019.0 LTS devices. Unlimited physical access to the PLC may lead to a manipulation of SD cards data. SD card manipulation may lead to an authentication bypass opportunity.
Last Update
Feb. 18, 2020, 8:43 a.m.
Weakness
Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119)
Summary
Python Software Foundation CPython version From 3.2 until 3.6.4 on Windows contains a Buffer Overflow vulnerability in os.symlink() function on Windows that can result in Arbitrary code execution, likely escalation of privilege. This attack appears to be exploitable via a python script that creates a symlink with an attacker controlled name or location. This vulnerability appears to have been fixed in 3.7.0 and 3.6.5.
Last Update
Feb. 18, 2020, 8:44 a.m.
Weakness
Buffer Underwrite ('Buffer Underflow') (CWE-124)
Summary
In stroke_socket.c in strongSwan before 5.6.3, a missing packet length check could allow a buffer underflow, which may lead to resource exhaustion and denial of service while reading from the socket.
Last Update
Feb. 18, 2020, 9:21 a.m.
Weakness
Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119)
Summary
curl supports "globbing" of URLs, in which a user can pass a numerical range to have the tool iterate over those numbers to do a sequence of transfers. In the globbing function that parses the numerical range, there was an omission that made curl read a byte beyond the end of the URL if given a carefully crafted, or just wrongly written, URL. The URL is stored in a heap based buffer, so it could then be made to wrongly read something else instead of crashing. An example of a URL that triggers the flaw would be `http://ur%20[0-60000000000000000000`.
Last Update
Feb. 18, 2020, 8:43 a.m.
Weakness
Information Exposure (CWE-200)
Summary
When doing a TFTP transfer and curl/libcurl is given a URL that contains a very long file name (longer than about 515 bytes), the file name is truncated to fit within the buffer boundaries, but the buffer size is still wrongly updated to use the untruncated length. This too large value is then used in the sendto() call, making curl attempt to send more data than what is actually put into the buffer. The endto() function will then read beyond the end of the heap based buffer. A malicious HTTP(S) server could redirect a vulnerable libcurl-using client to a crafted TFTP URL (if the client hasn't restricted which protocols it allows redirects to) and trick it to send private memory contents to a remote server over UDP. Limit curl's redirect protocols with --proto-redir and libcurl's with CURLOPT_REDIR_PROTOCOLS.
Last Update
Feb. 18, 2020, 8:40 a.m.
Weakness
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (CWE-79)
Summary
Cross-site scripting (XSS) vulnerability in jQuery UI before 1.12.0 might allow remote attackers to inject arbitrary web script or HTML via the closeText parameter of the dialog function.
Last Update
Feb. 18, 2020, 8:42 a.m.
Weakness
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (CWE-79)
Summary
jQuery before 3.0.0 is vulnerable to Cross-site Scripting (XSS) attacks when a cross-domain Ajax request is performed without the dataType option, causing text/javascript responses to be executed.
Last Update
Feb. 18, 2020, 8:43 a.m.
Weakness
Information Exposure (CWE-200)
Summary
There is an overflow bug in the AVX2 Montgomery multiplication procedure used in exponentiation with 1024-bit moduli. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH1024 are considered just feasible, because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be significant. However, for an attack on TLS to be meaningful, the server would have to share the DH1024 private key among multiple clients, which is no longer an option since CVE-2016-0701. This only affects processors that support the AVX2 but not ADX extensions like Intel Haswell (4th generation). Note: The impact from this issue is similar to CVE-2017-3736, CVE-2017-3732 and CVE-2015-3193. OpenSSL version 1.0.2-1.0.2m and 1.1.0-1.1.0g are affected. Fixed in OpenSSL 1.0.2n. Due to the low severity of this issue we are not issuing a new release of OpenSSL 1.1.0 at this time. The fix will be included in OpenSSL 1.1.0h when it becomes available. The fix is also available in commit e502cc86d in the OpenSSL git repository.
Last Update
Feb. 18, 2020, 8:44 a.m.
Weakness
Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119)
Summary
An issue was discovered on Phoenix Contact AXC F 2152 (No.2404267) before 2019.0 LTS and AXC F 2152 STARTERKIT (No.1046568) before 2019.0 LTS devices. Protocol Fuzzing on PC WORX Engineer by a man in the middle attacker stops the PLC service. The device must be rebooted, or the PLC service must be restarted manually via a Linux shell.
Last Update
Feb. 18, 2020, 8:43 a.m.
Weakness
Use of a Broken or Risky Cryptographic Algorithm (CWE-327)
Summary
The OpenSSL RSA Key generation algorithm has been shown to be vulnerable to a cache timing side channel attack. An attacker with sufficient access to mount cache timing attacks during the RSA key generation process could recover the private key. Fixed in OpenSSL 1.1.0i-dev (Affected 1.1.0-1.1.0h). Fixed in OpenSSL 1.0.2p-dev (Affected 1.0.2b-1.0.2o).
Last Update
Feb. 18, 2020, 8:43 a.m.
Weakness
Out-of-bounds Write (CWE-787)
Summary
OpenSSL 1.0.2 (starting from version 1.0.2b) introduced an "error state" mechanism. The intent was that if a fatal error occurred during a handshake then OpenSSL would move into the error state and would immediately fail if you attempted to continue the handshake. This works as designed for the explicit handshake functions (SSL_do_handshake(), SSL_accept() and SSL_connect()), however due to a bug it does not work correctly if SSL_read() or SSL_write() is called directly. In that scenario, if the handshake fails then a fatal error will be returned in the initial function call. If SSL_read()/SSL_write() is subsequently called by the application for the same SSL object then it will succeed and the data is passed without being decrypted/encrypted directly from the SSL/TLS record layer. In order to exploit this issue an application bug would have to be present that resulted in a call to SSL_read()/SSL_write() being issued after having already received a fatal error. OpenSSL version 1.0.2b-1.0.2m are affected. Fixed in OpenSSL 1.0.2n. OpenSSL 1.1.0 is not affected.
Last Update
Feb. 18, 2020, 8:43 a.m.
Weakness
Improper Privilege Management (CWE-269)
Summary
The process_open function in sftp-server.c in OpenSSH before 7.6 does not properly prevent write operations in readonly mode, which allows attackers to create zero-length files.
Last Update
Feb. 18, 2020, 8:44 a.m.
Weakness
Key Management Errors (CWE-320)
Summary
An issue was discovered in OPC UA .NET Standard Stack and Sample Code before GitHub commit 2018-04-12, and OPC UA .NET Legacy Stack and Sample Code before GitHub commit 2018-03-13. A vulnerability in OPC UA applications can allow a remote attacker to determine a Server's private key by sending carefully constructed bad UserIdentityTokens as part of an oracle attack.
Last Update
Jan. 31, 2020, 3:29 p.m.
Weakness
Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119)
Summary
While parsing an IPAddressFamily extension in an X.509 certificate, it is possible to do a one-byte overread. This would result in an incorrect text display of the certificate. This bug has been present since 2006 and is present in all versions of OpenSSL before 1.0.2m and 1.1.0g.

Impact

see CVEs for details.

Solution

Update to Firmware Release 2019.0 LTS or later.

Update to PLCnext Engineer Release 2019.0 LTS or later.

Update A, 30.08.2019
With Firmware Release 2019.6 an option was added to the web-based
management that allows the user to permanently disable storage of configuration data to the
SD-Card. The device can now be operated without SD-Card and ignores any inserted SD-Card.
We recommend using this new configuration option for application scenarios where physical
access to the device cannot be restricted effectively.

General Recommendation

Customers using Phoenix Contact AXC F 2152 are recommended to operate the devices in closed networks or protected with a suitable firewall. For detailed information on our recommendations for measures to protect network-capable devices, please refer to our application note:
“Art.-Nr. 107913: AH EN INDUSTRIAL SECURITY “Measures to protect network-capable devices with Ethernet connection against unauthorized access”

Reported by

These vulnerabilities were discovered with the support of firmwareanalyzer.com
Zahra Khani (Firmalyzer SPRL) and the OPC Foundation.