Test ID:	1.3.6.1.4.1.25623.1.1.13.2023.200.02
Category:	Slackware Local Security Checks
Title:	Slackware: Security Advisory (SSA:2023-200-02)
Summary:	The remote host is missing an update for the 'openssh' package(s) announced via the SSA:2023-200-02 advisory.
Description:	Summary: The remote host is missing an update for the 'openssh' package(s) announced via the SSA:2023-200-02 advisory. Vulnerability Insight: New openssh packages are available for Slackware 15.0 and -current to fix a security issue. Here are the details from the Slackware 15.0 ChangeLog: +--------------------------+ patches/packages/openssh-9.3p2-i586-1_slack15.0.txz: Upgraded. This update fixes a security issue: ssh-agent(1) in OpenSSH between and 5.5 and 9.3p1 (inclusive): remote code execution relating to PKCS#11 providers. The PKCS#11 support ssh-agent(1) could be abused to achieve remote code execution via a forwarded agent socket if the following conditions are met: * Exploitation requires the presence of specific libraries on the victim system. * Remote exploitation requires that the agent was forwarded to an attacker-controlled system. Exploitation can also be prevented by starting ssh-agent(1) with an empty PKCS#11/FIDO allowlist (ssh-agent -P '') or by configuring an allowlist that contains only specific provider libraries. This vulnerability was discovered and demonstrated to be exploitable by the Qualys Security Advisory team. Potentially-incompatible changes: * ssh-agent(8): the agent will now refuse requests to load PKCS#11 modules issued by remote clients by default. A flag has been added to restore the previous behaviour: '-Oallow-remote-pkcs11'. For more information, see: [links moved to references] (* Security fix *) +--------------------------+ Affected Software/OS: 'openssh' package(s) on Slackware 15.0, Slackware current. Solution: Please install the updated package(s). CVSS Score: 10.0 CVSS Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C
Cross-Ref:	Common Vulnerability Exposure (CVE) ID: CVE-2023-38408 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CEBTJJINE2I3FHAUKKNQWMFGYMLSMWKQ/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RAXVQS6ZYTULFAK3TEJHRLKZALJS3AOU/ https://security.gentoo.org/glsa/202307-01 http://packetstormsecurity.com/files/173661/OpenSSH-Forwarded-SSH-Agent-Remote-Code-Execution.html https://blog.qualys.com/vulnerabilities-threat-research/2023/07/19/cve-2023-38408-remote-code-execution-in-opensshs-forwarded-ssh-agent https://github.com/openbsd/src/commit/7bc29a9d5cd697290aa056e94ecee6253d3425f8 https://github.com/openbsd/src/commit/f03a4faa55c4ce0818324701dadbf91988d7351d https://github.com/openbsd/src/commit/f8f5a6b003981bb824329dc987d101977beda7ca https://news.ycombinator.com/item?id=36790196 https://www.qualys.com/2023/07/19/cve-2023-38408/rce-openssh-forwarded-ssh-agent.txt https://www.vicarius.io/vsociety/posts/exploring-opensshs-agent-forwarding-rce-cve-2023-38408 https://lists.debian.org/debian-lts-announce/2023/08/msg00021.html http://www.openwall.com/lists/oss-security/2023/07/20/1 http://www.openwall.com/lists/oss-security/2023/07/20/2 http://www.openwall.com/lists/oss-security/2023/09/22/11 http://www.openwall.com/lists/oss-security/2023/09/22/9
Copyright	Copyright (C) 2023 Greenbone AG

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