CVE-2015-6806

Severity: medium (CVSS 5.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.1% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2015-09-28 · updated 2026-06-17
Weakness: CWE-119

Description

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.

Affected products

Gnu Screen: through 4.3.1

References

http://git.savannah.gnu.org/cgit/screen.git/commit/?id=b7484c224738247b510ed0d268cd577076958f1b
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00001.html
http://www.debian.org/security/2015/dsa-3352
http://www.openwall.com/lists/oss-security/2015/09/01/1
http://www.openwall.com/lists/oss-security/2015/09/03/11
http://www.openwall.com/lists/oss-security/2015/09/03/4
https://savannah.gnu.org/bugs/?45713
https://usn.ubuntu.com/3996-1/
http://git.savannah.gnu.org/cgit/screen.git/commit/?id=b7484c224738247b510ed0d268cd577076958f1b
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00001.html
http://www.debian.org/security/2015/dsa-3352
http://www.openwall.com/lists/oss-security/2015/09/01/1

Get alerted when CVE-2015-6806 or the next vulnerability affects your stack