CVE-2011-1930 Command injection in klibc

What is CVE-2011-1930?

CVE-2011-1930 is a critical command injection vulnerability in Debian Debian Linux, published on 14 Nov 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Which versions are affected by CVE-2011-1930?

It affects 2 products.

Products include Debian Debian Linux, Klibc Project Klibc.

How do I fix CVE-2011-1930?

Apply the vendor's patch.

Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.

Is CVE-2011-1930 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2011-1930 exists.

Public exploit code: 1 Exploit-DB entry.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as CVE-2012-2382, DEBIAN-CVE-2011-1930, GHSA-h949-qrpv-p29v.