CVE-2013-4270

Severity: low (CVSS 3.6 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2013-12-09 · updated 2026-06-16
Weakness: CWE-20

Description

The net_ctl_permissions function in net/sysctl_net.c in the Linux kernel before 3.11.5 does not properly determine uid and gid values, which allows local users to bypass intended /proc/sys/net restrictions via a crafted application.

Affected products

Linux kernel: through 3.11.4; 3.0-rc1, 3.0-rc2, 3.0-rc3, 3.0-rc4, 3.0-rc5, 3.0-rc6 (+262)

References

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=2433c8f094a008895e66f25bd1773cdb01c91d01
http://rhn.redhat.com/errata/RHSA-2014-0100.html
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.11.5
http://www.ubuntu.com/usn/USN-2049-1
https://bugzilla.redhat.com/show_bug.cgi?id=1027752
https://github.com/torvalds/linux/commit/2433c8f094a008895e66f25bd1773cdb01c91d01
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=2433c8f094a008895e66f25bd1773cdb01c91d01
http://rhn.redhat.com/errata/RHSA-2014-0100.html
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.11.5
http://www.ubuntu.com/usn/USN-2049-1
https://bugzilla.redhat.com/show_bug.cgi?id=1027752
https://github.com/torvalds/linux/commit/2433c8f094a008895e66f25bd1773cdb01c91d01

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