HOME VULNERABILITIESCVE-2011-1930

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CVE-2011-1930

NVD-CWE-OtherPublished: November 14, 2019· Updated: Jun 16, 2026

9.8

CVSS v3.1

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.

Technical Analysis

CVE-2011-1930 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

A proof-of-concept (PoC) exploit exists for CVE-2011-1930. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Affected Vendors & Products

Debian1 product(s)

debian linux

klibc_project1 product(s)

klibc

Source: NVD CPE · 4 total CPE entries

Exploit & PoC Resources

POC AVAILABLEProof-of-concept code exists

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

CVE Program entry

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttp://security.gentoo.org/glsa/glsa-201309-21.xml

ADVISORYhttp://www.openwall.com/lists/oss-security/2012/05/22/12

ADVISORYhttp://www.securityfocus.com/bid/47924

ADVISORYhttps://access.redhat.com/security/cve/cve-2011-1930

ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2011-1930

ADVISORYhttp://security.gentoo.org/glsa/glsa-201309-21.xml

ADVISORYhttp://www.openwall.com/lists/oss-security/2012/05/22/12

ADVISORYhttp://www.securityfocus.com/bid/47924

ADVISORYhttps://access.redhat.com/security/cve/cve-2011-1930

ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2011-1930

All References (10)

→

http://security.gentoo.org/glsa/glsa-201309-21.xmlThird Party Advisory

→

http://www.openwall.com/lists/oss-security/2012/05/22/12Mailing List · Third Party Advisory

→

http://www.securityfocus.com/bid/47924Third Party Advisory · VDB Entry

→

https://access.redhat.com/security/cve/cve-2011-1930Not Applicable · Third Party Advisory

→

https://security-tracker.debian.org/tracker/CVE-2011-1930Third Party Advisory

→

http://security.gentoo.org/glsa/glsa-201309-21.xmlThird Party Advisory

→

http://www.openwall.com/lists/oss-security/2012/05/22/12Mailing List · Third Party Advisory

→

http://www.securityfocus.com/bid/47924Third Party Advisory · VDB Entry

→

https://access.redhat.com/security/cve/cve-2011-1930Not Applicable · Third Party Advisory

→

https://security-tracker.debian.org/tracker/CVE-2011-1930Third Party Advisory

Quick Facts

CVE IDCVE-2011-1930

CVSS Score9.8 / 10

SeverityCRITICAL

WeaknessNVD-CWE-Other

CISA KEVNo

ExploitPOC

Affected2 vendor(s)

PublishedNov 14, 2019

Related CVEs (NVD-CWE-Other)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2011-1930 in threat intel feeds
→Review IDS/IPS signatures for exploitation attempts

Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.

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