CVE-2011-3188

CRITICALCVSS 9.1/10EPSS 5.69%

Last modified

CVE-2011-3188 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. 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.. EPSS estimates a 5.69% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
9.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

EPSS Probability
5.69%

92.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

VendorProductVersions
LinuxLinux Kernel< 3.1
RedhatEnterprise Linux4.0
F5Arx>= 6.0.0, <= 6.4.0
F5Big-Ip Access Policy Manager>= 10.1.0, <= 10.2.4
F5Big-Ip Access Policy Manager>= 11.0.0, <= 11.1.0
F5Big-Ip Analytics>= 11.0.0, <= 11.1.0
F5Big-Ip Application Security Manager>= 10.0.0, <= 10.2.4
F5Big-Ip Application Security Manager>= 11.0.0, <= 11.1.0
F5Big-Ip Edge Gateway>= 10.1.0, <= 10.2.4
F5Big-Ip Edge Gateway>= 11.0.0, <= 11.1.0
F5Big-Ip Global Traffic Manager>= 10.0.0, <= 10.2.4
F5Big-Ip Global Traffic Manager>= 11.0.0, <= 11.1.0
F5Big-Ip Link Controller>= 10.0.0, <= 10.2.4
F5Big-Ip Link Controller>= 11.0.0, <= 11.1.0
F5Big-Ip Local Traffic Manager>= 10.0.0, <= 10.2.4
F5Big-Ip Local Traffic Manager>= 11.0.0, <= 11.1.0
F5Big-Ip Protocol Security Module>= 10.0.0, <= 10.2.4
F5Big-Ip Protocol Security Module>= 11.0.0, <= 11.1.0
F5Big-Ip Wan Optimization Manager>= 10.0.0, <= 10.2.4
F5Big-Ip Wan Optimization Manager>= 11.0.0, <= 11.1.0
F5Big-Ip Webaccelerator>= 10.0.0, <= 10.2.4
F5Big-Ip Webaccelerator>= 11.0.0, <= 11.1.0
F5Enterprise Manager>= 2.1.0, <= 2.3.0
F5Enterprise Manager3.0.0
F5Firepass>= 6.0.0, <= 6.1.0
F5Firepass7.0.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2011-3188?
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.
How severe is CVE-2011-3188?
CVE-2011-3188 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 5.69% probability of exploitation in the next 30 days.
How do I fix CVE-2011-3188?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2011-3188?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST