vulnerability

Red Hat: CVE-2023-25136: the functions order_hostkeyalgs() and list_hostkey_types() leads to double-free vulnerability (Multiple Advisories)

Severity
8
CVSS
(AV:N/AC:M/Au:N/C:N/I:P/A:C)
Published
2023-02-03
Added
2023-05-15
Modified
2025-01-30

Description

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."

Solution(s)

redhat-upgrade-opensshredhat-upgrade-openssh-askpassredhat-upgrade-openssh-askpass-debuginforedhat-upgrade-openssh-clientsredhat-upgrade-openssh-clients-debuginforedhat-upgrade-openssh-debuginforedhat-upgrade-openssh-debugsourceredhat-upgrade-openssh-keycatredhat-upgrade-openssh-keycat-debuginforedhat-upgrade-openssh-serverredhat-upgrade-openssh-server-debuginforedhat-upgrade-openssh-sk-dummy-debuginforedhat-upgrade-pam_ssh_agent_authredhat-upgrade-pam_ssh_agent_auth-debuginfo
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