AIX OpenSSH Advisory : openssh_advisory6.asc
Medium Nessus Plugin ID 86656
SynopsisThe remote AIX host has a version of OpenSSH installed that is affected by multiple vulnerabilities.
DescriptionThe remote AIX host has a version of OpenSSH installed that is affected by the following vulnerabilities :
- A flaw exists in the monitor component when handling extraneous username data in MONITOR_REQ_PAM_INIT_CTX requests. A local attacker can exploit this issue to conduct an impersonation attack, by sending a crafted MONITOR_REQ_PWNAM request that leverages any SSH login access with control of the sshd UID. (CVE-2015-6563)
- A use-after-free error exists in function mm_answer_pam_free_ctx() in the file monitor.c when handling MONITOR_REQ_PAM_FREE_CTX requests. A local attacker can exploit this to gain elevated privileges, by leveraging control of the sshd UID to send an unexpectedly early MONITOR_REQ_PAM_FREE_CTX request.
SolutionA fix is available and can be downloaded from the AIX website.