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CVE-2011-3188

9.1 · CRITICAL

The (1) IPv4 and (2) IPv6 implementations in the Linux kernel before 3.1 use a modified MD4 algorithm to generate sequence numbers and Fragment Identification values, which makes it easier for remo…

Published May 24, 2012linuxEPSS 5.03%

Overview

CVE-2011-3188 is a critical-severity vulnerability affecting linux linux_kernel. It was published on May 24, 2012 and has a CVSS 3.1 base score of 9.1 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.1, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

The (1) IPv4 and (2) IPv6 implementations in the Linux kernel before 3.1 use a modified MD4 algorithm to generate sequence numbers and Fragment Identification values, which makes it easier for remote attackers to cause a denial of service (disrupted networking) or hijack network sessions by predicting these values and sending crafted packets.

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>= 0, < 3.1Affected
f5arx6.0.0Affected
f5big-ip_access_policy_manager10.1.0Affected
f5big-ip_analytics11.0.0Affected
f5big-ip_application_security_manager10.0.0Affected
f5big-ip_edge_gateway10.1.0Affected
f5big-ip_global_traffic_manager10.0.0Affected
f5big-ip_link_controller10.0.0Affected
f5big-ip_local_traffic_manager10.0.0Affected
f5big-ip_protocol_security_module10.0.0Affected
f5big-ip_wan_optimization_manager10.0.0Affected
f5big-ip_webaccelerator10.0.0Affected
f5enterprise_manager2.1.0Affected
f5firepass6.0.0Affected

References

Refgit.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=6e5714eaf77d79ae1c8b47e3e040ff5411b717ecRefgit.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=bc0b96b54a21246e377122d54569eef71cec535fRefmarc.info/?l=bugtraq&m=139447903326211&w=2Refwww.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.1Refwww.openwall.com/lists/oss-security/2011/08/23/2Refbugzilla.redhat.com/show_bug.cgi?id=732658GitHubgithub.com/torvalds/linux/commit/6e5714eaf77d79ae1c8b47e3e040ff5411b717ecGitHubgithub.com/torvalds/linux/commit/bc0b96b54a21246e377122d54569eef71cec535fRefsupport.f5.com/csp/article/K15301?utm_source=f5support&amp%3Butm_medium=RSSRefgit.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=6e5714eaf77d79ae1c8b47e3e040ff5411b717ec

How CyberStrike helps

Frequently asked questions

What is CVE-2011-3188?

CVE-2011-3188 is a critical-severity vulnerability affecting linux linux_kernel. It was published on May 24, 2012 and has a CVSS 3.1 base score of 9.1 (CRITICAL).

How severe is CVE-2011-3188?

This vulnerability has a CVSS 3.1 base score of 9.1, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2011-3188?

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-2011-3188?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2011-3188 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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