SUSE-SU-2024:0539-1: important: Security update for libssh

SLE-UPDATES null at suse.de
Tue Feb 20 20:36:48 UTC 2024



# Security update for libssh

Announcement ID: SUSE-SU-2024:0539-1  
Rating: important  
References:

  * bsc#1158095
  * bsc#1168699
  * bsc#1174713
  * bsc#1189608
  * bsc#1211188
  * bsc#1211190
  * bsc#1218126
  * bsc#1218186
  * bsc#1218209
  * jsc#PED-7719

  
Cross-References:

  * CVE-2019-14889
  * CVE-2020-16135
  * CVE-2020-1730
  * CVE-2021-3634
  * CVE-2023-1667
  * CVE-2023-2283
  * CVE-2023-48795
  * CVE-2023-6004
  * CVE-2023-6918

  
CVSS scores:

  * CVE-2019-14889 ( SUSE ):  7.1 CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
  * CVE-2019-14889 ( NVD ):  8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
  * CVE-2019-14889 ( NVD ):  7.1 CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
  * CVE-2020-16135 ( SUSE ):  5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2020-16135 ( NVD ):  5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2020-1730 ( SUSE ):  5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
  * CVE-2020-1730 ( NVD ):  5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
  * CVE-2021-3634 ( SUSE ):  3.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L
  * CVE-2021-3634 ( NVD ):  6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  * CVE-2023-1667 ( SUSE ):  4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
  * CVE-2023-1667 ( NVD ):  6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  * CVE-2023-2283 ( SUSE ):  4.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
  * CVE-2023-2283 ( NVD ):  6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
  * CVE-2023-48795 ( SUSE ):  5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
  * CVE-2023-48795 ( NVD ):  5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
  * CVE-2023-6004 ( SUSE ):  4.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L
  * CVE-2023-6004 ( NVD ):  4.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L
  * CVE-2023-6918 ( SUSE ):  5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
  * CVE-2023-6918 ( NVD ):  5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

  
Affected Products:

  * SUSE Linux Enterprise High Performance Computing 12 SP5
  * SUSE Linux Enterprise Server 12 SP5
  * SUSE Linux Enterprise Server for SAP Applications 12 SP5
  * SUSE Linux Enterprise Software Development Kit 12 SP5

  
  
An update that solves nine vulnerabilities and contains one feature can now be
installed.

## Description:

This update for libssh fixes the following issues:

Update to version 0.9.8 (jsc#PED-7719):

  * Fix CVE-2023-6004: Command injection using proxycommand (bsc#1218209)
  * Fix CVE-2023-48795: Potential downgrade attack using strict kex
    (bsc#1218126)
  * Fix CVE-2023-6918: Missing checks for return values of MD functions
    (bsc#1218186)
  * Allow @ in usernames when parsing from URI composes

Update to version 0.9.7

  * Fix CVE-2023-1667: a NULL dereference during rekeying with algorithm
    guessing (bsc#1211188)
  * Fix CVE-2023-2283: a possible authorization bypass in
    pki_verify_data_signature under low-memory conditions (bsc#1211190)
  * Fix several memory leaks in GSSAPI handling code

Update to version 0.9.6 (bsc#1189608, CVE-2021-3634)

  * https://git.libssh.org/projects/libssh.git/tag/?h=libssh-0.9.6

Update to version 0.9.5 (bsc#1174713, CVE-2020-16135):

  * CVE-2020-16135: Avoid null pointer dereference in sftpserver (T232)
  * Improve handling of library initialization (T222)
  * Fix parsing of subsecond times in SFTP (T219)
  * Make the documentation reproducible
  * Remove deprecated API usage in OpenSSL
  * Fix regression of ssh_channel_poll_timeout() returning SSH_AGAIN
  * Define version in one place (T226)
  * Prevent invalid free when using different C runtimes than OpenSSL (T229)
  * Compatibility improvements to testsuite

Update to version 0.9.4:

  * https://www.libssh.org/2020/04/09/libssh-0-9-4-and-libssh-0-8-9-security-
    release/
  * Fix possible Denial of Service attack when using AES-CTR-ciphers
    CVE-2020-1730 (bsc#1168699)

Update to version 0.9.3:

  * Fixed CVE-2019-14889 - SCP: Unsanitized location leads to command execution
    (bsc#1158095)
  * SSH-01-003 Client: Missing NULL check leads to crash in erroneous state
  * SSH-01-006 General: Various unchecked Null-derefs cause DOS
  * SSH-01-007 PKI Gcrypt: Potential UAF/double free with RSA pubkeys
  * SSH-01-010 SSH: Deprecated hash function in fingerprinting
  * SSH-01-013 Conf-Parsing: Recursive wildcards in hostnames lead to DOS
  * SSH-01-014 Conf-Parsing: Integer underflow leads to OOB array access
  * SSH-01-001 State Machine: Initial machine states should be set explicitly
  * SSH-01-002 Kex: Differently bound macros used to iterate same array
  * SSH-01-005 Code-Quality: Integer sign confusion during assignments
  * SSH-01-008 SCP: Protocol Injection via unescaped File Names
  * SSH-01-009 SSH: Update documentation which RFCs are implemented
  * SSH-01-012 PKI: Information leak via uninitialized stack buffer

Update to version 0.9.2:

  * Fixed libssh-config.cmake
  * Fixed issues with rsa algorithm negotiation (T191)
  * Fixed detection of OpenSSL ed25519 support (T197)

Update to version 0.9.1:

  * Added support for Ed25519 via OpenSSL
  * Added support for X25519 via OpenSSL
  * Added support for localuser in Match keyword
  * Fixed Match keyword to be case sensitive
  * Fixed compilation with LibreSSL
  * Fixed error report of channel open (T75)
  * Fixed sftp documentation (T137)
  * Fixed known_hosts parsing (T156)
  * Fixed build issue with MinGW (T157)
  * Fixed build with gcc 9 (T164)
  * Fixed deprecation issues (T165)
  * Fixed known_hosts directory creation (T166)

Update to verion 0.9.0:

  * Added support for AES-GCM
  * Added improved rekeying support
  * Added performance improvements
  * Disabled blowfish support by default
  * Fixed several ssh config parsing issues
  * Added support for DH Group Exchange KEX
  * Added support for Encrypt-then-MAC mode
  * Added support for parsing server side configuration file
  * Added support for ECDSA/Ed25519 certificates
  * Added FIPS 140-2 compatibility
  * Improved known_hosts parsing
  * Improved documentation
  * Improved OpenSSL API usage for KEX, DH, and signatures

  * Add libssh client and server config files

## Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like
YaST online_update or "zypper patch".  
Alternatively you can run the command listed for your product:

  * SUSE Linux Enterprise Software Development Kit 12 SP5  
    zypper in -t patch SUSE-SLE-SDK-12-SP5-2024-539=1

  * SUSE Linux Enterprise High Performance Computing 12 SP5  
    zypper in -t patch SUSE-SLE-SERVER-12-SP5-2024-539=1

  * SUSE Linux Enterprise Server 12 SP5  
    zypper in -t patch SUSE-SLE-SERVER-12-SP5-2024-539=1

  * SUSE Linux Enterprise Server for SAP Applications 12 SP5  
    zypper in -t patch SUSE-SLE-SERVER-12-SP5-2024-539=1

## Package List:

  * SUSE Linux Enterprise Software Development Kit 12 SP5 (aarch64 ppc64le s390x
    x86_64)
    * libssh-devel-0.9.8-3.12.2
    * libssh4-debuginfo-0.9.8-3.12.2
    * libssh4-0.9.8-3.12.2
    * libssh-debugsource-0.9.8-3.12.2
  * SUSE Linux Enterprise High Performance Computing 12 SP5 (aarch64 x86_64)
    * libssh4-debuginfo-0.9.8-3.12.2
    * libssh-config-0.9.8-3.12.2
    * libssh4-0.9.8-3.12.2
    * libssh-debugsource-0.9.8-3.12.2
  * SUSE Linux Enterprise High Performance Computing 12 SP5 (x86_64)
    * libssh4-32bit-0.9.8-3.12.2
    * libssh4-debuginfo-32bit-0.9.8-3.12.2
  * SUSE Linux Enterprise Server 12 SP5 (aarch64 ppc64le s390x x86_64)
    * libssh4-debuginfo-0.9.8-3.12.2
    * libssh-config-0.9.8-3.12.2
    * libssh4-0.9.8-3.12.2
    * libssh-debugsource-0.9.8-3.12.2
  * SUSE Linux Enterprise Server 12 SP5 (s390x x86_64)
    * libssh4-32bit-0.9.8-3.12.2
    * libssh4-debuginfo-32bit-0.9.8-3.12.2
  * SUSE Linux Enterprise Server for SAP Applications 12 SP5 (ppc64le x86_64)
    * libssh4-debuginfo-0.9.8-3.12.2
    * libssh-config-0.9.8-3.12.2
    * libssh4-0.9.8-3.12.2
    * libssh-debugsource-0.9.8-3.12.2
  * SUSE Linux Enterprise Server for SAP Applications 12 SP5 (x86_64)
    * libssh4-32bit-0.9.8-3.12.2
    * libssh4-debuginfo-32bit-0.9.8-3.12.2

## References:

  * https://www.suse.com/security/cve/CVE-2019-14889.html
  * https://www.suse.com/security/cve/CVE-2020-16135.html
  * https://www.suse.com/security/cve/CVE-2020-1730.html
  * https://www.suse.com/security/cve/CVE-2021-3634.html
  * https://www.suse.com/security/cve/CVE-2023-1667.html
  * https://www.suse.com/security/cve/CVE-2023-2283.html
  * https://www.suse.com/security/cve/CVE-2023-48795.html
  * https://www.suse.com/security/cve/CVE-2023-6004.html
  * https://www.suse.com/security/cve/CVE-2023-6918.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1158095
  * https://bugzilla.suse.com/show_bug.cgi?id=1168699
  * https://bugzilla.suse.com/show_bug.cgi?id=1174713
  * https://bugzilla.suse.com/show_bug.cgi?id=1189608
  * https://bugzilla.suse.com/show_bug.cgi?id=1211188
  * https://bugzilla.suse.com/show_bug.cgi?id=1211190
  * https://bugzilla.suse.com/show_bug.cgi?id=1218126
  * https://bugzilla.suse.com/show_bug.cgi?id=1218186
  * https://bugzilla.suse.com/show_bug.cgi?id=1218209
  * https://jira.suse.com/browse/PED-7719

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