openssh: post-auth memory corruption when using AES-GCM cipher
Published Nov 8, 2013
6.0
MEDIUMCVSS 2.0
EPSS 2.67%
Description
The mm_newkeys_from_blob function in monitor_wrap.c in sshd in OpenSSH 6.2 and 6.3, when an AES-GCM cipher is used, does not properly initialize memory for a MAC context data structure, which allows remote authenticated users to bypass intended ForceCommand and login-shell restrictions via packet data that provides a crafted callback address.
Affected products
No data.
No data.
Red Hat Enterprise Linux 5
openssh
Not affected
Red Hat Enterprise Linux 6
openssh
Not affected
Red Hat Enterprise Linux 7
openssh
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | openssh | Not affected | n/a |
| Red Hat Enterprise Linux 6 | openssh | Not affected | n/a |
| Red Hat Enterprise Linux 7 | openssh | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
Not vulnerable. This issue did not affect the versions of openssh as shipped with Red Hat Enterprise Linux 5 and 6 as they did not include support for AES-GCM cipher suites.
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:P/I:P/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 (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.67% (0.02670) | 85.23th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.67% (0.02670) | 83.74th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.29% (0.00291) | 50.43th | v4 (v2025.03.14) |
| Dec 12, 2024 | 1.00% (0.00995) | 84.25th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.42% (0.00416) | 73.39th | v3 (v2023.03.01) |
| Jun 21, 2023 | 0.42% (0.00416) | 70.47th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.48% (0.00476) | 71.97th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.23% (0.01232) | 67.28th | v2 (v2022.01.01) |
| Dec 23, 2022 | 1.23% (0.01232) | 66.86th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.23% (0.01232) | 64.85th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.23% (0.01232) | 41.02th | v2 (v2022.01.01) |
References (9)
- http://lists.opensuse.org/opensuse-security-announce/2013-11/msg00017.html vendor-advisoryx_refsource_SUSE
- http://marc.info/?l=bugtraq&m=141576985122836&w=2 vendor-advisoryx_refsource_HP
- http://openwall.com/lists/oss-security/2013/11/08/3 mailing-listx_refsource_MLIST
- http://www.openssh.com/txt/gcmrekey.adv x_refsource_CONFIRMVendor Advisory
- http://www.ubuntu.com/usn/USN-2014-1 vendor-advisoryx_refsource_UBUNTU
- https://access.redhat.com/security/cve/CVE-2013-4548 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1028418 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2013-4548
- https://www.cve.org/CVERecord?id=CVE-2013-4548
| Link | Providers | Tags |
|---|---|---|
| http://lists.opensuse.org/opensuse-security-announce/2013-11/msg00017.html | vendor-advisoryx_refsource_SUSE | |
| http://marc.info/?l=bugtraq&m=141576985122836&w=2 | vendor-advisoryx_refsource_HP | |
| http://openwall.com/lists/oss-security/2013/11/08/3 | mailing-listx_refsource_MLIST | |
| http://www.openssh.com/txt/gcmrekey.adv | x_refsource_CONFIRMVendor Advisory | |
| http://www.ubuntu.com/usn/USN-2014-1 | vendor-advisoryx_refsource_UBUNTU | |
| https://access.redhat.com/security/cve/CVE-2013-4548 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1028418 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2013-4548 | ||
| https://www.cve.org/CVERecord?id=CVE-2013-4548 |
Change history (0)
No recorded changes yet.