PRIOn knowledge basePRION:CVE-2023-25136Double free
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.”
References
www.openwall.com/lists/oss-security/2023/02/13/1
www.openwall.com/lists/oss-security/2023/02/22/1
www.openwall.com/lists/oss-security/2023/02/22/2
www.openwall.com/lists/oss-security/2023/02/23/3
www.openwall.com/lists/oss-security/2023/03/06/1
www.openwall.com/lists/oss-security/2023/03/09/2
bugzilla.mindrot.org/show_bug.cgi?id=3522
ftp.openbsd.org/pub/OpenBSD/patches/7.2/common/017_sshd.patch.sig
github.com/openssh/openssh-portable/commit/486c4dc3b83b4b67d663fb0fa62bc24138ec3946
jfrog.com/blog/openssh-pre-auth-double-free-cve-2023-25136-writeup-and-proof-of-concept/
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JGAUIXJ3TEKCRKVWFQ6GDAGQFTIIGQQP/
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R7LKQDFZWKYHQ65TBSH2X2HJQ4V2THS3/
news.ycombinator.com/item?id=34711565
security.gentoo.org/glsa/202307-01
security.netapp.com/advisory/ntap-20230309-0003/
www.openwall.com/lists/oss-security/2023/02/02/2
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