K95345942 : Linux kernel vulnerability CVE-2015-3339

Security Advisory Description

Race condition in the prepare_binprm function in fs/exec.c in the Linux kernel before 3.19.6 allows local users to gain privileges by executing a setuid program at a time instant when a chown to root is in progress, and the ownership is changed but the setuid bit is not yet stripped. (CVE-2015-3339)

Impact

A local user with advanced shell (bash) access on a BIG-IP system, or with local administrator access on a Traffix system, may be able to use this flaw to gain elevated privileges. In supported configurations on the BIG-IP system, advanced shell access is limited to system administrators. BIG-IP appliance mode does not expose this issue, as users are not allowed advanced shell access in this mode. On Traffix systems, only administrators have local access.