Vulnerability Details : 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 ForceCommand and login-shell restrictions via packet data that provides a crafted callback address.
Threat overview for CVE-2013-4548
Top countries where our scanners detected CVE-2013-4548
Top open port discovered on systems with this issue
22
IPs affected by CVE-2013-4548 54,671
Threat actors abusing to this issue?
Yes
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affected by CVE-2013-4548!
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Exploit prediction scoring system (EPSS) score for CVE-2013-4548
Probability of exploitation activity in the next 30 days: 0.42%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 71 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2013-4548
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
---|---|---|---|---|---|
6.0
|
MEDIUM | AV:N/AC:M/Au:S/C:P/I:P/A:P |
6.8
|
6.4
|
NIST |
CWE ids for CVE-2013-4548
-
Assigned by: nvd@nist.gov (Primary)
References for CVE-2013-4548
-
http://openwall.com/lists/oss-security/2013/11/08/3
oss-security - Re: CVE Request - OpenSSH
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http://www.ubuntu.com/usn/USN-2014-1
USN-2014-1: OpenSSH vulnerability | Ubuntu security notices
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http://www.openssh.com/txt/gcmrekey.adv
Vendor Advisory
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http://marc.info/?l=bugtraq&m=141576985122836&w=2
'[security bulletin] HPSBUX03188 SSRT101487 rev.1 - HP-UX running HP Secure Shell, Remote Denial of S' - MARC
-
http://lists.opensuse.org/opensuse-security-announce/2013-11/msg00017.html
[security-announce] openSUSE-SU-2013:1726-1: important: openssh: securit
Products affected by CVE-2013-4548
- cpe:2.3:a:openbsd:openssh:6.3:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:6.2:*:*:*:*:*:*:*