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
Link Resource
http://www.openwall.com/lists/oss-security/2023/02/13/1 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2023/02/22/1 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2023/02/22/2 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2023/02/23/3 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2023/03/06/1 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2023/03/09/2 Mailing List Third Party Advisory
https://bugzilla.mindrot.org/show_bug.cgi?id=3522 Exploit Issue Tracking Third Party Advisory
https://ftp.openbsd.org/pub/OpenBSD/patches/7.2/common/017_sshd.patch.sig Patch Vendor Advisory
https://github.com/openssh/openssh-portable/commit/486c4dc3b83b4b67d663fb0fa62bc24138ec3946 Patch Third Party Advisory
https://jfrog.com/blog/openssh-pre-auth-double-free-cve-2023-25136-writeup-and-proof-of-concept/ Exploit Third Party Advisory
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=34711565 Issue Tracking Third Party Advisory
https://security.gentoo.org/glsa/202307-01 Third Party Advisory
https://security.netapp.com/advisory/ntap-20230309-0003/ Third Party Advisory
https://www.openwall.com/lists/oss-security/2023/02/02/2 Exploit Mailing List Third Party Advisory
History

No history.

cve-icon MITRE Information

Status: PUBLISHED

Assigner: mitre

Published: 2023-02-03T00:00:00

Updated: 2023-07-20T00:00:00

Reserved: 2023-02-03T00:00:00


Link: CVE-2023-25136

JSON object: View

cve-icon NVD Information

Status : Modified

Published: 2023-02-03T06:15:09.350

Modified: 2024-02-27T15:15:14.617


Link: CVE-2023-25136

JSON object: View

cve-icon Redhat Information

No data.

CWE