Home/CVE/The tftp_request function in tftp.c in dnsmasq before 2.50, when --enable-tftp is used, allows remote attackers to cause
CVE

CVE-2009-2958

The tftp_request function in tftp.c in dnsmasq before 2.50, when --enable-tftp is used, allows remote attackers to cause

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.

MEDIUM · CVSS 4.3 EPSS 0.01131
Schedule remediation
  • Public exploit or PoC is available
Sigma rules0 YARA rules0
▤

Affected Products & Versions

2
thekelleys dnsmasq<= 2.49
thekelleys dnsmasqall versions
⚠

Public Exploits & PoCs

1
dosDnsmasq < 2.50 - Heap Overflow / Null Pointer Dereferenceverified
◈

Detection Rules (IDS/IPS)

2
snort-communityPROTOCOL-TFTP GET filename overflow attemptattempted-admin
snort-communityPROTOCOL-TFTP PUT filename overflow attemptattempted-admin
Open rulesets (ET Open, Snort Community, abuse.ch) link to source. Commercial rulesets are reference-only.
▣

Scoring & Timeline

4.3
MEDIUM · CVSS v2 (legacy) · cve@mitre.org
View on NVD
This CVE predates CVSS v3; the legacy v2 score is shown so triage still has a severity to work with.
v2 Vector
AV:N/AC:M/Au:N/C:N/I:N/A:P
Published to NVD02 Sep 2009 · 03:30 PM
⚑

Vendor Advisories

3
rhsaRHSA-2010:0095Important
usnUSN-827-1
rhsaRHSA-2009:1238Important
🔗

References & Sources

9
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://secunia.com/advisories/36563
http://www.coresecurity.com/content/dnsmasq-vulnerabilities
http://www.redhat.com/support/errata/RHSA-2009-1238.html
http://www.securityfocus.com/bid/36120
http://www.thekelleys.org.uk/dnsmasq/CHANGELOG
http://www.ubuntu.com/usn/USN-827-1
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