CVE-2009-2958

Severity: medium (CVSS 4.3 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 10.8% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2009-09-02 · updated 2026-06-16
Weakness: CWE-399

Description

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.

Affected products

Simon Kelley dnsmasq: through 2.49; 0.4, 0.5, 0.6, 0.7, 0.95, 0.96 (+69)

References

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
https://bugzilla.redhat.com/show_bug.cgi?id=519020
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9816
https://rhn.redhat.com/errata/RHSA-2010-0095.html
http://secunia.com/advisories/36563
http://www.coresecurity.com/content/dnsmasq-vulnerabilities
http://www.redhat.com/support/errata/RHSA-2009-1238.html

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