CVE-2015-6563 Auth bypass in n/a

What is CVE-2015-6563?

CVE-2015-6563 is a medium-severity authentication bypass vulnerability in Apple Mac Os X, published on 24 Aug 2015. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

The monitor component in sshd in OpenSSH before 7.0 on non-OpenBSD platforms accepts extraneous username data in MONITOR_REQ_PAM_INIT_CTX requests, which allows local users to conduct impersonation attacks by leveraging any SSH login access in conjunction with control of the sshd uid to send a crafted MONITOR_REQ_PWNAM request, related to monitor.c and monitor_wrap.c.

Weakness: CWE-20

Which versions are affected by CVE-2015-6563?

It affects 2 products.

Products include Apple Mac Os X, OpenSSH.

How do I fix CVE-2015-6563?

Upgrade to a fixed version.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2015-6563 being exploited?

There is no known exploitation of CVE-2015-6563 in the wild and no public exploit code.

Other vulnerabilities in Apple Mac Os X

• CVE-2014-7169 GNU Bourne-Again Shell (Bash) Arbitrary Code Execution Exploited Critical 9.8
• CVE-2014-6271 GNU Bourne-Again Shell (Bash) Arbitrary Code Execution Exploited Critical 9.8
• CVE-2012-1823 PHP-CGI Query String Parameter Exploited Critical 9.8
• CVE-2021-30713 Apple macOS Unspecified Exploited High 7.8
• CVE-2019-8526 Apple macOS Use-After-Free Exploited High 7.8

All Apple Mac Os X vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2015-6563, GHSA-2f6c-wrfr-f7rw, UBUNTU-CVE-2015-6563.