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CVE-2011-2189

HIGHCVSS 7.5/10EPSS 17.84%

Last modified

CVE-2011-2189 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. net/core/net_namespace.c in the Linux kernel 2.6.32 and earlier does not properly handle a high rate of creation and cleanup of network namespaces, which makes it easier for remote attackers to cause a denial of service (memory consumption) via requests to a daemon that requires a separate namespace per connection, as demonstrated by vsftpd.. EPSS estimates a 17.84% chance of exploitation in the next 30 days.

Description

net/core/net_namespace.c in the Linux kernel 2.6.32 and earlier does not properly handle a high rate of creation and cleanup of network namespaces, which makes it easier for remote attackers to cause a denial of service (memory consumption) via requests to a daemon that requires a separate namespace per connection, as demonstrated by vsftpd.

Metrics

CVSS 3.1
7.5/10

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

EPSS Probability
17.84%

96.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
LinuxLinux Kernel<= 2.6.32
RedhatEnterprise Linux6.0
RedhatEnterprise Mrg2.0
CanonicalUbuntu Linux10.04
CanonicalUbuntu Linux10.10
CanonicalUbuntu Linux11.04
CanonicalUbuntu Linux11.10
DebianDebian Linux5.0
DebianDebian Linux6.0
DebianDebian Linux7.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2011-2189?
net/core/net_namespace.c in the Linux kernel 2.6.32 and earlier does not properly handle a high rate of creation and cleanup of network namespaces, which makes it easier for remote attackers to cause a denial of service (memory consumption) via requests to a daemon that requires a separate namespace per connection, as demonstrated by vsftpd.
How severe is CVE-2011-2189?
CVE-2011-2189 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 17.84% probability of exploitation in the next 30 days.
How do I fix CVE-2011-2189?
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.

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Source: NVD / NIST