漏洞描述
OpenSSH 服务(sshd) 9.1版本在options.kex_algorithms处理时存在double-free漏洞，攻击者在默认配置下可能触发此漏洞。由于现代内存分配器对double-free的保护缓解机制，该漏洞在真实场景中难以利用。
影响产品
修复建议
建议关注厂商安全公告，及时升级至已修复版本，并结合实际资产暴露情况采取缓解措施。
参考链接
www.openwall.comhttp://www.openwall.com/lists/oss-security/2023/02/13/1↗www.openwall.comhttp://www.openwall.com/lists/oss-security/2023/02/22/1↗www.openwall.comhttp://www.openwall.com/lists/oss-security/2023/02/22/2↗www.openwall.comhttp://www.openwall.com/lists/oss-security/2023/02/23/3↗www.openwall.comhttp://www.openwall.com/lists/oss-security/2023/03/06/1↗www.openwall.comhttp://www.openwall.com/lists/oss-security/2023/03/09/2↗bugzilla.mindrot.orghttps://bugzilla.mindrot.org/show_bug.cgi?id=3522↗ftp.openbsd.orghttps://ftp.openbsd.org/pub/OpenBSD/patches/7.2/common/017_sshd.patch.sig↗github.comhttps://github.com/openssh/openssh-portable/commit/486c4dc3b83b4b67d663fb0fa6...↗jfrog.comhttps://jfrog.com/blog/openssh-pre-auth-double-free-cve-2023-25136-writeup-an...↗lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedora...↗lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedora...↗news.ycombinator.comhttps://news.ycombinator.com/item?id=34711565↗security.gentoo.orghttps://security.gentoo.org/glsa/202307-01↗security.netapp.comhttps://security.netapp.com/advisory/ntap-20230309-0003/↗www.openwall.comhttps://www.openwall.com/lists/oss-security/2023/02/02/2↗