CVE-2023-25136
25Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 90%
exploitation probability
90%top 1% of all CVEs
observed exploitation
nono source reports it
What the vendors declare (VEX)
Official vendor statements in CSAF/VEX format: whether their product is affected, already fixed, or ruled out — and why. These are the vendor's assertions, not Vexday's judgment.
Red HatVEX document ↗
Fixed
2 products (114 components)
Red Hat Enterprise Linux AppStream (v. 9) · Red Hat Enterprise Linux BaseOS (v. 9)
Not affected
3 products (26 components) — because the vulnerable code is not present in the product
Red Hat Enterprise Linux 7 · Red Hat Enterprise Linux 8 · Red Hat Enterprise Linux 6
OpenSSH server (sshd) 9.1 introduced a double-free vulnerability during options.kex_algorithms handling. This is fixed in OpenSSH 9.2. The double free can be leveraged, by an unauthenticated remote attacker in the default configuration, to jump to any location in the sshd address space. One third-party report states "remote code execution is theoretically possible."
Affected products
n/a · n/aReferences
https://bugzilla.mindrot.org/show_bug.cgi?id=3522https://ftp.openbsd.org/pub/OpenBSD/patches/7.2/common/017_sshd.patch.sighttps://github.com/openssh/openssh-portable/commit/486c4dc3b83b4b67d663fb0fa62bc24138ec3946https://jfrog.com/blog/openssh-pre-auth-double-free-cve-2023-25136-writeup-and-proof-of-concept/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JGAUIXJ3TEKCRKVWFQ6GDAGQFTIIGQQP/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R7LKQDFZWKYHQ65TBSH2X2HJQ4V2THS3/https://news.ycombinator.com/item?id=34711565https://security.gentoo.org/glsa/202307-01https://security.netapp.com/advisory/ntap-20230309-0003/https://www.openwall.com/lists/oss-security/2023/02/02/2http://www.openwall.com/lists/oss-security/2023/02/13/1http://www.openwall.com/lists/oss-security/2023/02/22/1