How severe is CVE-2011-5000?

CVE-2011-5000 has a CVSS 2.0 base score of 3.5, rated low severity.

Is CVE-2011-5000 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-5000?

CVE-2011-5000 primarily affects Openbsd Openssh. In total, 66 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-5000?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2011-5000 published?

CVE-2011-5000 was published on 2012-04-05 and last updated on 2026-06-16.

CVE-2011-5000

CVE-2011-5000 is a low-severity vulnerability in Openbsd Openssh with a CVSS 2.0 base score of 3.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-189.

Key facts

Severity: Low (CVSS 2.0 base score 3.5)
EPSS exploit prediction: 3% (83rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-189
Affected product: Openbsd Openssh
Published: 2012-04-05
Last modified: 2026-06-16

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.

Frequently asked questions

What is CVE-2011-5000?: 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.
How severe is CVE-2011-5000?: CVE-2011-5000 has a CVSS 2.0 base score of 3.5, rated low severity.
Is CVE-2011-5000 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-5000?: CVE-2011-5000 primarily affects Openbsd Openssh. In total, 66 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-5000?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-5000 published?: CVE-2011-5000 was published on 2012-04-05 and last updated on 2026-06-16.

References

Affected products (66)

cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:1.2:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:1.2.1:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:1.2.2:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:1.2.3:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:1.2.27:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:1.3:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:1.5:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:1.5.7:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:1.5.8:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:3.0:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:3.0.1:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:3.0.1p1:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:3.0.2:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:3.0.2p1:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:3.0p1:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:3.1:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:3.1p1:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:3.2:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:3.2.2:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:3.2.2p1:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:3.2.3p1:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:3.3:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:3.3p1:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:3.4:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:3.4p1:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:3.5:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:3.5p1:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:3.6:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:3.6.1:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:3.6.1p1:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:3.6.1p2:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:3.7:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:3.7.1:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:3.7.1p1:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:3.7.1p2:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:3.8:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:3.8.1:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:3.8.1p1:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:3.9:*:*:*:*:*:*:*

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Threat intelligence

Threat-intel indicators referencing this CVE:

69.73.187.130 (ipv4-addr)
122.114.69.235 (ipv4-addr)
92.47.46.174 (ipv4-addr)
76.12.128.249 (ipv4-addr)
62.182.118.138 (ipv4-addr)
61.76.136.25 (ipv4-addr)
213.135.175.76 (ipv4-addr)
187.237.47.214 (ipv4-addr)