openssh: post-authentication resource exhaustion bug via GSSAPI
Published Apr 4, 2012
3.5
LOWCVSS 2.0
EPSS 2.56%
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.
Affected products
No data.
- ≤ 5.8
- 1.2
- 1.2.1
- 1.2.2
- 1.2.3
- 1.2.27
- 1.3
- 1.5
- 1.5.7
- 1.5.8
- 3.0
- 3.0.1
- 3.0.1p1
- 3.0.2
- 3.0.2p1
- 3.0p1
- 3.1
- 3.1p1
- 3.2
- 3.2.2
- 3.2.2p1
- 3.2.3p1
- 3.3
- 3.3p1
- 3.4
- 3.4p1
- 3.5
- 3.5p1
- 3.6
- 3.6.1
- 3.6.1p1
- 3.6.1p2
- 3.7
- 3.7.1
- 3.7.1p1
- 3.7.1p2
- 3.8
- 3.8.1
- 3.8.1p1
- 3.9
- 3.9.1
- 3.9.1p1
- 4.0
- 4.0p1
- 4.1
- 4.1p1
- 4.2
- 4.2p1
- 4.3
- 4.3p1
- 4.3p2
- 4.4
- 4.4p1
- 4.5
- 4.6
- 4.7
- 4.8
- 4.9
- 5.0
- 5.1
- 5.2
- 5.3
- 5.4
- 5.5
- 5.6
- 5.7
No data.
Red Hat Enterprise Linux 6
openssh-0:5.3p1-81.el6
Fixed · RHSA-2012:0884
Red Hat Enterprise Linux 4
openssh
Will not fix
Red Hat Enterprise Linux 5
openssh
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | openssh-0:5.3p1-81.el6 | Fixed | RHSA-2012:0884 |
| Red Hat Enterprise Linux 4 | openssh | Will not fix | n/a |
| Red Hat Enterprise Linux 5 | openssh | Will not fix | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:S/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.56% (0.02565) | 84.57th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.60% (0.02595) | 83.25th | v5 (v2026.06.15) |
| Mar 30, 2025 | 0.78% (0.00776) | 71.37th | v4 (v2025.03.14) |
| Mar 29, 2025 | 1.99% (0.01988) | 72.77th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.67% (0.00667) | 69.55th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.35% (0.00353) | 72.80th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.35% (0.00353) | 71.15th | v3 (v2023.03.01) |
| Aug 31, 2023 | 0.35% (0.00353) | 68.42th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.37% (0.00369) | 68.26th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.06% (0.01061) | 52.82th | v2 (v2022.01.01) |
| Sep 19, 2022 | 1.06% (0.01061) | 51.19th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.06% (0.01061) | 49.19th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.06% (0.01061) | 28.23th | v2 (v2022.01.01) |
References (7)
- http://rhn.redhat.com/errata/RHSA-2012-0884.html vendor-advisoryx_refsource_REDHAT
- http://seclists.org/fulldisclosure/2011/Aug/2 mailing-listx_refsource_FULLDISCExploit
- http://site.pi3.com.pl/adv/ssh_1.txt x_refsource_MISCExploit
- https://access.redhat.com/security/cve/CVE-2011-5000 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=809938 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2011-5000
- https://www.cve.org/CVERecord?id=CVE-2011-5000
| Link | Providers | Tags |
|---|---|---|
| http://rhn.redhat.com/errata/RHSA-2012-0884.html | vendor-advisoryx_refsource_REDHAT | |
| http://seclists.org/fulldisclosure/2011/Aug/2 | mailing-listx_refsource_FULLDISCExploit | |
| http://site.pi3.com.pl/adv/ssh_1.txt | x_refsource_MISCExploit | |
| https://access.redhat.com/security/cve/CVE-2011-5000 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=809938 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2011-5000 | ||
| https://www.cve.org/CVERecord?id=CVE-2011-5000 |
Change history (0)
No recorded changes yet.