The MScrollV function in ansi.c in GNU screen 4.3.1 and earlier does not properly limit recursion, which allows remote attackers to cause a denial of service (stack consumption) via an escape sequence with a large repeat count value.
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.openwall.com/lists/oss-security/2015/09/03/11 | exploit mailing list |
| http://www.openwall.com/lists/oss-security/2015/09/01/1 | mailing list |
| http://git.savannah.gnu.org/cgit/screen.git/commit/?id=b7484c224738247b510ed0d268cd577076958f1b | |
| http://www.openwall.com/lists/oss-security/2015/09/03/4 | mailing list |
| https://savannah.gnu.org/bugs/?45713 | vendor advisory exploit |
| http://www.debian.org/security/2015/dsa-3352 | vendor advisory |
| https://usn.ubuntu.com/3996-1/ | vendor advisory |
| http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00001.html | vendor advisory |