Heap-based buffer overflow in chrony before 1.31.1 allows remote authenticated users to cause a denial of service (chronyd crash) or possibly execute arbitrary code by configuring the (1) NTP or (2) cmdmon access with a subnet size that is indivisible by four and an address with a nonzero bit in the subnet remainder.
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 |
|---|---|
| http://www.debian.org/security/2015/dsa-3222 | vendor advisory |
| http://listengine.tuxfamily.org/chrony.tuxfamily.org/chrony-announce/2015/04/msg00002.html | patch vendor advisory mailing list |
| http://www.securityfocus.com/bid/73955 | vdb entry |
| http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html | |
| https://security.gentoo.org/glsa/201507-01 | vendor advisory |