CVE-2009-2958

mediumpriority · track · 31EPSS 0.107 · 96 %ileexploit · functionalEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · functional

Likely / severe?

10.8% (96th) EPSS

CVSS 4.3 · medium

Is it mine?

94 products

Check your exposure

Who says so?

4 sources

enisa_euvd · fstec_bdu · nvd · redhat_csaf

EPSS · scored 2026-10-27

The tftp_request function in tftp.c in dnsmasq before 2.50, when --enable-tftp is used, allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a TFTP read (aka RRQ) request with a malformed blksize option.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

Fixeddnsmasq-0:2.45-1.1.el5_3.i386 as a component of Red Hat Enterprise Linux (v. 5 server)redhat_csaf
Before applying this update, make sure that all previously-released errata relevant to your system have been applied. This update is available via Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2009:1238
Fixeddnsmasq-0:2.45-1.1.el5_3.i386 as a component of Red Hat Enterprise Linux Desktop (v. 5 client)redhat_csaf
Before applying this update, make sure that all previously-released errata relevant to your system have been applied. This update is available via Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2009:1238
Fixeddnsmasq-0:2.45-1.1.el5_3.ia64 as a component of Red Hat Enterprise Linux (v. 5 server)redhat_csaf
Before applying this update, make sure that all previously-released errata relevant to your system have been applied. This update is available via Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2009:1238
Fixeddnsmasq-0:2.45-1.1.el5_3.ppc as a component of Red Hat Enterprise Linux (v. 5 server)redhat_csaf
Before applying this update, make sure that all previously-released errata relevant to your system have been applied. This update is available via Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2009:1238
Fixeddnsmasq-0:2.45-1.1.el5_3.s390x as a component of Red Hat Enterprise Linux (v. 5 server)redhat_csaf
Before applying this update, make sure that all previously-released errata relevant to your system have been applied. This update is available via Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2009:1238
Fixeddnsmasq-0:2.45-1.1.el5_3.src as a component of Red Hat Enterprise Linux (v. 5 server)redhat_csaf
Before applying this update, make sure that all previously-released errata relevant to your system have been applied. This update is available via Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2009:1238
Fixeddnsmasq-0:2.45-1.1.el5_3.src as a component of Red Hat Enterprise Linux Desktop (v. 5 client)redhat_csaf
Before applying this update, make sure that all previously-released errata relevant to your system have been applied. This update is available via Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2009:1238
Fixeddnsmasq-0:2.45-1.1.el5_3.x86_64 as a component of Red Hat Enterprise Linux (v. 5 server)redhat_csaf
Before applying this update, make sure that all previously-released errata relevant to your system have been applied. This update is available via Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2009:1238
Fixeddnsmasq-0:2.45-1.1.el5_3.x86_64 as a component of Red Hat Enterprise Linux Desktop (v. 5 client)redhat_csaf
Before applying this update, make sure that all previously-released errata relevant to your system have been applied. This update is available via Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2009:1238
Fixeddnsmasq-debuginfo-0:2.45-1.1.el5_3.i386 as a component of Red Hat Enterprise Linux (v. 5 server)redhat_csaf
Before applying this update, make sure that all previously-released errata relevant to your system have been applied. This update is available via Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2009:1238
Fixeddnsmasq-debuginfo-0:2.45-1.1.el5_3.i386 as a component of Red Hat Enterprise Linux Desktop (v. 5 client)redhat_csaf
Before applying this update, make sure that all previously-released errata relevant to your system have been applied. This update is available via Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2009:1238
Fixeddnsmasq-debuginfo-0:2.45-1.1.el5_3.ia64 as a component of Red Hat Enterprise Linux (v. 5 server)redhat_csaf
Before applying this update, make sure that all previously-released errata relevant to your system have been applied. This update is available via Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2009:1238
Fixeddnsmasq-debuginfo-0:2.45-1.1.el5_3.ppc as a component of Red Hat Enterprise Linux (v. 5 server)redhat_csaf
Before applying this update, make sure that all previously-released errata relevant to your system have been applied. This update is available via Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2009:1238
Fixeddnsmasq-debuginfo-0:2.45-1.1.el5_3.s390x as a component of Red Hat Enterprise Linux (v. 5 server)redhat_csaf
Before applying this update, make sure that all previously-released errata relevant to your system have been applied. This update is available via Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2009:1238
Fixeddnsmasq-debuginfo-0:2.45-1.1.el5_3.x86_64 as a component of Red Hat Enterprise Linux (v. 5 server)redhat_csaf
Before applying this update, make sure that all previously-released errata relevant to your system have been applied. This update is available via Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2009:1238
Fixeddnsmasq-debuginfo-0:2.45-1.1.el5_3.x86_64 as a component of Red Hat Enterprise Linux Desktop (v. 5 client)redhat_csaf
Before applying this update, make sure that all previously-released errata relevant to your system have been applied. This update is available via Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2009:1238

cvss

Technical severity, 0–10. One row per scoring source.

6.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 3.9–6.8

v2.04.3mediumAV:N/AC:M/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 8.6 · impact 2.9

v2.04.3mediumAV:N/AC:M/Au:N/C:N/I:N/A:Psecondary · FSTEC (BDU) RU

v2.03.9lowAV:N/AC:M/Au:N/C:N/I:N/A:P/E:POCsecondary · CVSS-BT (t0sche)

v2.06.8mediumAV:N/AC:M/Au:N/C:P/I:P/A:Psecondary · Red Hat Product Security US

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-399USprimaryCWE-399US

exploits (1)

Public proof-of-concept and weaponised exploit code.

EDB-9617Dnsmasq < 2.50 - Heap Overflow / Null Pointer Dereferencefunctional · exploit_db

affected products (94)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
Simon Kelley Dnsmasq2.0 → 2.50fstec_bduRU
thekelleys dnsmasq≤ 2.49nvdUScpe:2.3:a:thekelleys:dnsmasq:*:*:*:*:*:*:*:*
thekelleys dnsmasq= 0.4nvdUScpe:2.3:a:thekelleys:dnsmasq:*:*:*:*:*:*:*:*
thekelleys dnsmasq= 0.5nvdUScpe:2.3:a:thekelleys:dnsmasq:*:*:*:*:*:*:*:*
thekelleys dnsmasq= 0.6nvdUScpe:2.3:a:thekelleys:dnsmasq:*:*:*:*:*:*:*:*
thekelleys dnsmasq= 0.7nvdUScpe:2.3:a:thekelleys:dnsmasq:*:*:*:*:*:*:*:*
thekelleys dnsmasq= 0.95nvdUScpe:2.3:a:thekelleys:dnsmasq:*:*:*:*:*:*:*:*
thekelleys dnsmasq= 0.96nvdUScpe:2.3:a:thekelleys:dnsmasq:*:*:*:*:*:*:*:*
thekelleys dnsmasq= 0.98nvdUScpe:2.3:a:thekelleys:dnsmasq:*:*:*:*:*:*:*:*
thekelleys dnsmasq= 0.992nvdUScpe:2.3:a:thekelleys:dnsmasq:*:*:*:*:*:*:*:*
thekelleys dnsmasq= 0.996nvdUScpe:2.3:a:thekelleys:dnsmasq:*:*:*:*:*:*:*:*
thekelleys dnsmasq= 1.0nvdUScpe:2.3:a:thekelleys:dnsmasq:*:*:*:*:*:*:*:*
thekelleys dnsmasq= 1.10nvdUScpe:2.3:a:thekelleys:dnsmasq:*:*:*:*:*:*:*:*
thekelleys dnsmasq= 1.11nvdUScpe:2.3:a:thekelleys:dnsmasq:*:*:*:*:*:*:*:*
thekelleys dnsmasq= 1.12nvdUScpe:2.3:a:thekelleys:dnsmasq:*:*:*:*:*:*:*:*
thekelleys dnsmasq= 1.13nvdUScpe:2.3:a:thekelleys:dnsmasq:*:*:*:*:*:*:*:*
thekelleys dnsmasq= 1.14nvdUScpe:2.3:a:thekelleys:dnsmasq:*:*:*:*:*:*:*:*
thekelleys dnsmasq= 1.15nvdUScpe:2.3:a:thekelleys:dnsmasq:*:*:*:*:*:*:*:*
thekelleys dnsmasq= 1.16nvdUScpe:2.3:a:thekelleys:dnsmasq:*:*:*:*:*:*:*:*

showing 20 of 94

advisories (1)

Vendor and ecosystem advisories describing this.

RHSA-2009:1238Red Hat Security Advisory: dnsmasq security update2009-09-01csaf · redhat_csafUS
An updated dnsmasq package that fixes two security issues is now available for Red Hat Enterprise Linux 5. This update has been rated as having important security impact by the Red Hat Security Response Team.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

enisa_euvd fstec_bdu nvd redhat_csaf NVD CVE.org MITRE

published 2009-09-02modified 2026-06-16

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+3721 more

references (18)

External citations — patches, advisories, analysis.

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