CVE-2013-4548
6.0 · MEDIUMOverview
CVE-2013-4548 is a medium-severity vulnerability affecting openbsd openssh. It was published on November 8, 2013 and has a CVSS 2.0 base score of 6.0 (MEDIUM).
This vulnerability has a CVSS 2.0 base score of 6.0, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from openbsd. Update openssh to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
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References
Frequently Asked Questions
What is CVE-2013-4548?
CVE-2013-4548 is a medium-severity vulnerability affecting openbsd openssh. It was published on November 8, 2013 and has a CVSS 2.0 base score of 6.0 (MEDIUM).
How severe is CVE-2013-4548?
This vulnerability has a CVSS 2.0 base score of 6.0, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2013-4548?
Check the references section for vendor advisories and patches from openbsd. Update openssh to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2013-4548?
CyberStrike's AI-powered security agents can automatically detect CVE-2013-4548 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
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