Skip to content
Fencer Intel
low 3.6

CVE-2013-4270 json

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, whic…

published 12y ago modified 4mo ago also EUVD-2013-4170

cvss
3.6
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 46%
public exploits
0
none known

Summary

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.

Patch / fix

  • linux Debian 14, Debian 13, Debian 12 3.11.5-1

debian advisories DEBIAN-CVE-2013-4270

  • kernel-rt enterprise mrg 2 3.8.13-rt27.33.el6rt
  • kernel-rt-trace enterprise mrg 2 3.8.13-rt27.33.el6rt
  • kernel-rt-vanilla enterprise mrg 2 3.8.13-rt27.33.el6rt
  • kernel-rt-firmware enterprise mrg 2 3.8.13-rt27.33.el6rt
  • kernel-rt-debuginfo-common-x86_64 enterprise mrg 2 3.8.13-rt27.33.el6rt

red hat advisories RHSA-2014:0100

Is CVE-2013-4270 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2013-4270 updated cvss 4.7

kernel: net: permissions flaw in /proc/sys/net

  • Red Hat Enterprise Linux 7 perf, kernel, bpftool, python-perf, kernel-kdump, kernel-tools, +3 more
    affected: no fix available
  • Red Hat MRG Realtime for RHEL 6 Server v.2 kernel-rt 3.8.13-rt27.33.el6rt, kernel-rt-trace 3.8.13-rt27.33.el6rt, kernel-rt-vanilla 3.8.13-rt27.33.el6rt, kernel-rt-firmware 3.8.13-rt27.33.el6rt, kernel-rt-debuginfo-common-x86_64 3.8.13-rt27.33.el6rt
    fixed: vendor fix RHSA-2014:0100
  • Red Hat Enterprise Linux 5 kernel Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.55% chance of exploitation in the next 30 days, higher than 46% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • github.com https://github.com/torvalds/linux/commit/2433c8f094a008895e66f25bd1773cdb01c91d01 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 3.6 AV:L/AC:L/Au:N/C:P/I:P/A:N

Classification

Weakness
  • CWE-20 Improper Input Validation
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.