CVE-2009-2957

Heap-based buffer overflow in the tftp_request function in tftp.c in dnsmasq before 2.50, when -...

6.8 MediumPublic exploitFix available

Heap-based buffer overflow in the tftp_request function in tftp.c in dnsmasq before 2.50, when --enable-tftp is used, might allow remote attackers to execute arbitrary code via a long filename in a TFTP packet, as demonstrated by a read (aka RRQ) request.

Exploit likelihood

15.3%Up 4.0 points since Feb 4, 2022

What each source reports

NVD Score used 6.8

Record: CVE-2009-2957
CVSS 2.0: 6.8 MediumAV:N/AC:M/Au:N/C:P/I:P/A:P
Weakness: CWE-119
Updated: 2026-11-02

CVE List No score

Record: CVE-2009-2957
Updated: 2026-11-02

EUVDEUVD-2009-2944 No score

Record: EUVD-2009-2944
Updated: 2026-11-03

GitHub AdvisoriesGHSA-3wv8-c9pw-2c36 No score

Heap-based buffer overflow in the tftp_request function in tftp.c in dnsmasq before 2.50, when -...

Record: GHSA-3wv8-c9pw-2c36
Weakness: CWE-119
Updated: 2026-11-02

OSV No score

Record: CVE-2009-2957
Updated: 2026-11-02

OSVDEBIAN-CVE-2009-2957 No score

Record: DEBIAN-CVE-2009-2957
Updated: 2026-11-02

Affected products

thekelleys dnsmasq

Affected packages

Affected packages
Package	Affected	Fixed
`dnsmasq` Debian:12	before 2.50-1	2.50-1
`dnsmasq` Debian:13	before 2.50-1	2.50-1
`dnsmasq` Debian:14	before 2.50-1	2.50-1
`dnsmasq` Debian:5.0 From an advisory covering 2 CVEs	before 2.45-1+lenny1, plus listed versions 2.45-1	2.45-1+lenny1
`dnsmasq` Red Hat:enterprise_linux:5::client From an advisory covering 2 CVEs	before 0:2.45-1.1.el5_3	0:2.45-1.1.el5_3
`dnsmasq-debuginfo` Red Hat:enterprise_linux:5::client From an advisory covering 2 CVEs	before 0:2.45-1.1.el5_3	0:2.45-1.1.el5_3
`dnsmasq` Red Hat:enterprise_linux:5::server From an advisory covering 2 CVEs	before 0:2.45-1.1.el5_3	0:2.45-1.1.el5_3
`dnsmasq-debuginfo` Red Hat:enterprise_linux:5::server From an advisory covering 2 CVEs	before 0:2.45-1.1.el5_3	0:2.45-1.1.el5_3

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
Exploit-DB	Dnsmasq < 2.50 - Heap Overflow / Null Pointer Dereference	2009-09-09

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, Exploit-DB, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2009-2957 is a medium vulnerability (CVSS 6.8) in Thekelleys Dnsmasq, published September 1, 2009. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 15.3%, the 96th percentile. Fixed in dnsmasq 2.50-1.

References

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