PAM S/Key does not clear provided credentials from memory, allowing local attackers to gain access to cleartext credentials.
| Package | Arch | Vulnerable | Unaffected |
|---|---|---|---|
| sys-auth/pam_skey | * | < 1.1.5-r5 | >= 1.1.5-r5 |
PAM S/Key is a pluggable authentication module for the OpenBSD Single-key Password system.
Ulrich Müller reported that a Gentoo patch to PAM S/Key does not remove credentials provided by the user from memory.
A local attacker with privileged access could inspect a memory dump to gain access to cleartext credentials provided by users.
There is no known workaround at this time.
All PAM S/Key users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=sys-auth/pam_skey-1.1.5-r5"