CVE-2013-4548
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…
Does this matter?
Lower severity and a low EPSS score (2.67%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 2.0
- 6.0 MEDIUMAV:N/AC:M/Au:S/C:P/I:P/A:P
- EPSS
- 2.67% probability · 85th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-264
- Affected
- openbsd/openssh
- Source
- secalert@redhat.com
References
- http://lists.opensuse.org/opensuse-security-announce/2013-11/msg00017.html
- http://marc.info/?l=bugtraq&m=141576985122836&w=2
- http://openwall.com/lists/oss-security/2013/11/08/3
- http://www.openssh.com/txt/gcmrekey.advVendor Advisory
- http://www.ubuntu.com/usn/USN-2014-1
- http://lists.opensuse.org/opensuse-security-announce/2013-11/msg00017.html
- http://marc.info/?l=bugtraq&m=141576985122836&w=2
- http://openwall.com/lists/oss-security/2013/11/08/3
- http://www.openssh.com/txt/gcmrekey.advVendor Advisory
- http://www.ubuntu.com/usn/USN-2014-1
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.