The proc_keys_show function in security/keys/proc.c in the Linux kernel through 4.8.2, when the GNU Compiler Collection (gcc) stack protector is enabled, uses an incorrect buffer size for certain timeout data, which allows local users to cause a denial of service (stack memory corruption and panic) by reading the /proc/keys file.
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
| Link | Tags |
|---|---|
| https://source.android.com/security/bulletin/2017-01-01.html | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1373966 | issue tracking third party advisory |
| http://www.openwall.com/lists/oss-security/2016/10/13/5 | mailing list |
| https://access.redhat.com/errata/RHSA-2017:2669 | vendor advisory |
| http://rhn.redhat.com/errata/RHSA-2017-0817.html | vendor advisory |
| https://access.redhat.com/errata/RHSA-2017:2077 | vendor advisory |
| https://access.redhat.com/errata/RHSA-2017:1842 | vendor advisory |
| http://www.securityfocus.com/bid/93544 | vdb entry |