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CVE-2011-5000

3.5 · LOW

The ssh_gssapi_parse_ename function in gss-serv.c in OpenSSH 5.8 and earlier, when gssapi-with-mic authentication is enabled, allows remote authenticated users to cause a denial of service (memory…

Published Apr 5, 2012openbsdCWE-189EPSS 2.56%

Overview

CVE-2011-5000 is a low-severity vulnerability affecting openbsd openssh. It was published on April 5, 2012 and has a CVSS 2.0 base score of 3.5 (LOW).

This vulnerability has a CVSS 2.0 base score of 3.5, rated LOW. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

The ssh_gssapi_parse_ename function in gss-serv.c in OpenSSH 5.8 and earlier, when gssapi-with-mic authentication is enabled, allows remote authenticated users to cause a denial of service (memory consumption) via a large value in a certain length field. NOTE: there may be limited scenarios in which this issue is relevant.

Remediation

Check the references section for vendor advisories and patches from openbsd. Update openssh 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
openbsdopenssh0Affected

References

Refrhn.redhat.com/errata/RHSA-2012-0884.htmlRefseclists.org/fulldisclosure/2011/Aug/2Refsite.pi3.com.pl/adv/ssh_1.txtRefrhn.redhat.com/errata/RHSA-2012-0884.htmlRefseclists.org/fulldisclosure/2011/Aug/2Refsite.pi3.com.pl/adv/ssh_1.txt

How CyberStrike helps

Frequently asked questions

What is CVE-2011-5000?

CVE-2011-5000 is a low-severity vulnerability affecting openbsd openssh. It was published on April 5, 2012 and has a CVSS 2.0 base score of 3.5 (LOW).

How severe is CVE-2011-5000?

This vulnerability has a CVSS 2.0 base score of 3.5, rated LOW. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2011-5000?

Check the references section for vendor advisories and patches from openbsd. Update openssh 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-2011-5000?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2011-5000 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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