CVE-2011-1930

Exp

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.

Published: 2019-11-14 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]

NVD Status：Modified，CVE State: published

View at NVD, CVE.org, EUVD

Threat Intelligence & Risk Assessment for CVE-2011-1930

EPSS CVSS Exploit-DB Affected OS Tracker

Conclusion & alert: CVE-2011-1930 is rated High Exploit Risk (82.9/100): CVSS Critical severity, with high exploitation likelihood (EPSS 28.99%, 96th percentile). Core evidence: 1 public exploit reference(s) are indexed (Exploit-DB). Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2011-1930

EDB-ID	Source	Kind	Published	Link
35785	exploit_db	edb	2011-05-18	Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2011-1930

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2025-03-30	48.82%	28.99%	-19.83%
2	2025-03-29	28.99%	48.82%	+19.83%
3	2025-03-24	—	28.99%	—

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-1930

CVSS metrics for this CVE.

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
9.8	3.1	CRITICAL	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	3.9	5.9	[email protected]
10.0	2.0	HIGH	`AV:N/AC:L/Au:N/C:C/I:C/A:C` Click to expand Access vector (AV:N) Can be exploited remotely over network reachability. Access complexity (AC:L) Exploitation conditions are straightforward and predictable. Authentication (AU:N) No authentication is required. Confidentiality impact (C:C) Complete confidentiality impact. Integrity impact (I:C) Complete integrity impact. Availability impact (A:C) Complete availability impact.	10.0	10.0	[email protected]

Weakness enumeration for CVE-2011-1930

OS Trackers for CVE-2011-1930

vendor	priority	summary	link
`debian`	low	CVE-2011-1930 low priority: Debian including 1 source packages (klibc), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5.	https://security-tracker.debian.org/tracker/CVE-2011-1930
`gentoo`	normal	CVE-2011-1930: 1 GLSA(s) (201309-21), 1 atom(s) (dev-libs/klibc); latest impact normal.	https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2011-1930
`ubuntu`	low	CVE-2011-1930 low priority: Ubuntu including 1 source packages (klibc), 13 status rows across 13 suites (hardy, lucid, maverick, natty, oneiric, precise, quantal, raring, saucy, trusty, upstream, utopic, vivid): not-affected 8, ignored 4, released 1.	https://ubuntu.com/security/CVE-2011-1930

Affected software / configurations for CVE-2011-1930

Vendor	Product	Version	Raw CPE
klibc_project	klibc	< 1.5.25	cpe:2.3:a:klibc_project:klibc::::::::
debian	debian_linux	8.0	cpe:2.3:o:debian:debian_linux:8.0:::::::*
debian	debian_linux	9.0	cpe:2.3:o:debian:debian_linux:9.0:::::::*
debian	debian_linux	10.0	cpe:2.3:o:debian:debian_linux:10.0:::::::*

References for CVE-2011-1930

URL	Tags
http://security.gentoo.org/glsa/glsa-201309-21.xml	Third Party Advisory
http://www.openwall.com/lists/oss-security/2012/05/22/12	Mailing List Third Party Advisory
http://www.securityfocus.com/bid/47924	Third Party Advisory VDB Entry
https://access.redhat.com/security/cve/cve-2011-1930	Not Applicable Third Party Advisory
https://security-tracker.debian.org/tracker/CVE-2011-1930	Third Party Advisory

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