CVE-2011-1930

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 20.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2019-11-14 · updated 2026-06-16

Description

In klibc 1.5.20 and 1.5.21, the DHCP options written by ipconfig to /tmp/net-$DEVICE.conf are not properly escaped. This may allow a remote attacker to send a specially crafted DHCP reply which could execute arbitrary code with the privileges of any process which sources DHCP options.

Affected products

Debian Linux: 8.0, 9.0, 10.0
Klibc Project Klibc: before 1.5.25 — fixed in 1.5.25

How to fix

Upgrade to a fixed version: Klibc Project Klibc 1.5.25. Check the vendor advisory for mitigations.

References

http://security.gentoo.org/glsa/glsa-201309-21.xml
http://www.openwall.com/lists/oss-security/2012/05/22/12
http://www.securityfocus.com/bid/47924
https://access.redhat.com/security/cve/cve-2011-1930
https://security-tracker.debian.org/tracker/CVE-2011-1930
http://security.gentoo.org/glsa/glsa-201309-21.xml
http://www.openwall.com/lists/oss-security/2012/05/22/12
http://www.securityfocus.com/bid/47924
https://access.redhat.com/security/cve/cve-2011-1930
https://security-tracker.debian.org/tracker/CVE-2011-1930

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