Test ID:	1.3.6.1.4.1.25623.1.1.10.2021.0441
Category:	Mageia Linux Local Security Checks
Title:	Mageia: Security Advisory (MGASA-2021-0441)
Summary:	The remote host is missing an update for the 'libssh' package(s) announced via the MGASA-2021-0441 advisory.
Description:	Summary: The remote host is missing an update for the 'libssh' package(s) announced via the MGASA-2021-0441 advisory. Vulnerability Insight: A flaw has been found in libssh in versions prior to 0.9.6. The SSH protocol keeps track of two shared secrets during the lifetime of the session. One of them is called secret_hash and the other session_id. Initially, both of them are the same, but after key re-exchange, previous session_id is kept and used as an input to new secret_hash. Historically, both of these buffers had shared length variable, which worked as long as these buffers were same. But the key re-exchange operation can also change the key exchange method, which can be based on hash of different size, eventually creating 'secret_hash' of different size than the session_id has. This becomes an issue when the session_id memory is zeroed or when it is used again during second key re-exchange. (CVE-2021-3634) Affected Software/OS: 'libssh' package(s) on Mageia 8. Solution: Please install the updated package(s). CVSS Score: 4.0 CVSS Vector: AV:N/AC:L/Au:S/C:N/I:N/A:P
Cross-Ref:	Common Vulnerability Exposure (CVE) ID: CVE-2021-3634 https://security.netapp.com/advisory/ntap-20211004-0003/ Debian Security Information: DSA-4965 (Google Search) https://www.debian.org/security/2021/dsa-4965 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JKYD3ZRAMDAQX3ZW6THHUF3GXN7FF6B4/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SVWAAB2XMKEUMPMDALINKAA4U2QM4LNG/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DRK67AJCWYYVAGF5SGAHNZXCX3PN3ZFP/ https://security.gentoo.org/glsa/202312-05 https://bugzilla.redhat.com/show_bug.cgi?id=1978810 https://www.oracle.com/security-alerts/cpujan2022.html
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