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CVE-2015-6806

5.0 · MEDIUM

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 seque…

Published Sep 28, 2015gnuCWE-119EPSS 4.15%

Overview

CVE-2015-6806 is a medium-severity vulnerability affecting gnu gnu_screen. It was published on September 28, 2015 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 5.0, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories and patches from gnu. Update gnu_screen to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
gnugnu_screen0Affected

References

Refgit.savannah.gnu.org/cgit/screen.git/commit/?id=b7484c224738247b510ed0d268cd577076958f1bReflists.opensuse.org/opensuse-security-announce/2019-06/msg00001.htmlRefwww.debian.org/security/2015/dsa-3352Refwww.openwall.com/lists/oss-security/2015/09/01/1Refwww.openwall.com/lists/oss-security/2015/09/03/11Refwww.openwall.com/lists/oss-security/2015/09/03/4Refsavannah.gnu.org/bugs/?45713Refusn.ubuntu.com/3996-1/Refgit.savannah.gnu.org/cgit/screen.git/commit/?id=b7484c224738247b510ed0d268cd577076958f1bReflists.opensuse.org/opensuse-security-announce/2019-06/msg00001.html

How CyberStrike helps

Frequently asked questions

What is CVE-2015-6806?

CVE-2015-6806 is a medium-severity vulnerability affecting gnu gnu_screen. It was published on September 28, 2015 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

How severe is CVE-2015-6806?

This vulnerability has a CVSS 2.0 base score of 5.0, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2015-6806?

Check the references section for vendor advisories and patches from gnu. Update gnu_screen to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2015-6806?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2015-6806 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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