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CVE-2013-4247

7.8 · HIGH

Off-by-one error in the build_unc_path_to_root function in fs/cifs/connect.c in the Linux kernel before 3.9.6 allows remote attackers to cause a denial of service (memory corruption and system cras…

Published Aug 25, 2013linuxCWE-189EPSS 3.64%

Overview

CVE-2013-4247 is a high-severity vulnerability affecting linux linux_kernel. It was published on August 25, 2013 and has a CVSS 2.0 base score of 7.8 (HIGH).

This vulnerability has a CVSS 2.0 base score of 7.8, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Off-by-one error in the build_unc_path_to_root function in fs/cifs/connect.c in the Linux kernel before 3.9.6 allows remote attackers to cause a denial of service (memory corruption and system crash) via a DFS share mount operation that triggers use of an unexpected DFS referral name length.

Remediation

Check the references section for vendor advisories and patches from linux. Update linux_kernel 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

VendorProductVersionsStatus
linuxlinux_kernel>= 3.8, < 3.9.6Affected

References

Refgit.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=1fc29bacedeabb278080e31bb9c1ecb49f143c3bRefwww.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.9.6Refwww.openwall.com/lists/oss-security/2013/08/14/10Refbugzilla.redhat.com/show_bug.cgi?id=998401GitHubgithub.com/torvalds/linux/commit/1fc29bacedeabb278080e31bb9c1ecb49f143c3bRefgit.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=1fc29bacedeabb278080e31bb9c1ecb49f143c3bRefwww.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.9.6Refwww.openwall.com/lists/oss-security/2013/08/14/10Refbugzilla.redhat.com/show_bug.cgi?id=998401GitHubgithub.com/torvalds/linux/commit/1fc29bacedeabb278080e31bb9c1ecb49f143c3b

How CyberStrike helps

Frequently asked questions

What is CVE-2013-4247?

CVE-2013-4247 is a high-severity vulnerability affecting linux linux_kernel. It was published on August 25, 2013 and has a CVSS 2.0 base score of 7.8 (HIGH).

How severe is CVE-2013-4247?

This vulnerability has a CVSS 2.0 base score of 7.8, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2013-4247?

Check the references section for vendor advisories and patches from linux. Update linux_kernel 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-2013-4247?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2013-4247 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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