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CVE-2017-13704

In dnsmasq before 2.78, if the DNS packet size does not match the expected size, the size parameter in a memset call gets a negative value.

Impact

In dnsmasq before 2.78, if the DNS packet size does not match the expected size, the size parameter in a memset call gets a negative value. As it is an unsigned value, memset ends up writing up to 0xffffffff zero's (0xffffffffffffffff in 64 bit platforms), making dnsmasq crash.

Affected products

VendorProductAffected versions
CanonicalUbuntu Linux
Versions 14.04, 16.04, 17.04
DebianDebian Linux
Versions 7.0, 7.1, 9.0
FedoraprojectFedora
Version 27
NovellLeap
Versions 42.2, 42.3
RedhatEnterprise Linux Desktop
Version 7.0
RedhatEnterprise Linux Server
Version 7.0
RedhatEnterprise Linux Workstation
Version 7.0
ThekelleysDnsmasq
through 2.77

Weakness classification

CWE-20

References