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CVE-2009-2844

7.8 · HIGH

cfg80211 in net/wireless/scan.c in the Linux kernel 2.6.30-rc1 and other versions before 2.6.31-rc6 allows remote attackers to cause a denial of service (crash) via a sequence of beacon frames in w…

Published Aug 18, 2009linuxCWE-399EPSS 3.36%

Overview

CVE-2009-2844 is a high-severity vulnerability affecting linux kernel. It was published on August 18, 2009 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

cfg80211 in net/wireless/scan.c in the Linux kernel 2.6.30-rc1 and other versions before 2.6.31-rc6 allows remote attackers to cause a denial of service (crash) via a sequence of beacon frames in which one frame omits an SSID Information Element (IE) and the subsequent frame contains an SSID IE, which triggers a NULL pointer dereference in the cmp_ies function. NOTE: a potential weakness in the is_mesh function was also addressed, but the relevant condition did not exist in the code, so it is not a vulnerability.

Remediation

Check the references section for vendor advisories and patches from linux. Update 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_kernel0Affected

References

Refgit.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=cd3468bad96c00b5a512f551674f36776129520eRefjon.oberheide.org/files/cfg80211-remote-dos.cRefsecunia.com/advisories/36278Refwww.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.30.5Refwww.openwall.com/lists/oss-security/2009/08/17/1Refwww.openwall.com/lists/oss-security/2009/08/17/2Refwww.securityfocus.com/bid/36052Refgit.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=cd3468bad96c00b5a512f551674f36776129520eRefjon.oberheide.org/files/cfg80211-remote-dos.cRefsecunia.com/advisories/36278

How CyberStrike helps

Frequently asked questions

What is CVE-2009-2844?

CVE-2009-2844 is a high-severity vulnerability affecting linux kernel. It was published on August 18, 2009 and has a CVSS 2.0 base score of 7.8 (HIGH).

How severe is CVE-2009-2844?

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-2009-2844?

Check the references section for vendor advisories and patches from linux. Update 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-2009-2844?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2009-2844 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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