Which products and versions are affected by CVE-2011-1930?

Affected: Klibc (Klibc Project) versions >= 1.5.20; Debian Linux versions 10.0, 8.0, 9.0. The full list is in the CVE brief.

Is CVE-2011-1930 being exploited in the wild?

It is not listed in any known-exploited vulnerabilities catalog.

Is CVE-2011-1930 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2011-1930?

Public exploit code is available.

Is there a fix for CVE-2011-1930?

Fixed versions are available, including Klibc 1.5.22-1, Klibc 1.5.25.

How urgently should CVE-2011-1930 be patched?

Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.

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WatchlistCritical

CVE-2011-1930Klibc Vulnerability

In klibc 1.5.20 and 1.5.21, the DHCP options written by ipconfig to /tmp/net-$DEVICE.conf are not properly escaped.

Published Nov 14, 2019 · Updated Aug 4, 2026 · Also known as DEBIAN-CVE-2011-1930

Key Facts

Patch immediately

CVE-2011-1930 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Klibc (Klibc Project), Debian Linux.
It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
EPSS estimates a 21% probability of exploitation in the next 30 days.
Fixed versions are available, including Klibc 1.5.22-1, Klibc 1.5.25.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.

Scores

CVSS v3.1

9.8

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

EPSS (30-day exploit likelihood)

21%

Higher than 97.4% of all scored CVEs

Exploit maturity

Proof of concept

ATLAS score

43/100

Publication score, see How it works

Exploitation Verdict

KEV listed

Not listed

Federal due date

None

No federal due date

Ransomware use

Not reported

Attributed actors

None named

Exploit & Defence Guidance

Exploit maturity

Proof of concept

Public exploit code

Proof-of-concept links

In-the-wild evidence

Reports of active use

Advisories And Exploit References

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

16 affected entries in total

Product	Affected versions	Fixed in
KlibcKlibc Project	>= 1.5.20	1.5.25
Debian LinuxDebian	10.0, 8.0, 9.0	n/a

Patched Releases

Klibc

1.5.22-1, 1.5.25

Timeline

Publicly disclosed
Nov 14, 2019
Last updated
Aug 4, 2026

References

advisoryaccess.redhat.com · CVE-2011-1930
advisorysecurity-tracker.debian.org · CVE-2011-1930
advisorysecurity.gentoo.org · glsa-201309-21.xml
advisoryopenwall.com · 12
advisorysecurityfocus.com · 47924

1 more references in the full CVE brief

FAQ

Common Questions.

In klibc 1.5.20 and 1.5.21, the DHCP options written by ipconfig to /tmp/net-$DEVICE.conf are not properly escaped.
Affected: Klibc (Klibc Project) versions >= 1.5.20; Debian Linux versions 10.0, 8.0, 9.0. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Klibc 1.5.22-1, Klibc 1.5.25.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.

Is CVE-2011-1930 On Your Attack Surface?

Brandefense matches it against the products discovered on your perimeter and opens a finding the day a CVE like this is listed.