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CVE
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CVE-2017-13704

Date: (C)2017-10-04   (M)2017-10-17
 
CVSS Score: 5.0Access Vector: NETWORK
Exploitability Subscore: 10.0Access Complexity: LOW
Impact Subscore: 2.9Authentication: NONE
 Confidentiality: NONE
 Integrity: NONE
 Availability: PARTIAL











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.

Reference:
BID-101085
SECTRACK-1039474
FEDORA-2017-274d763ed8
https://www.mail-archive.com/dnsmasq-discuss@lists.thekelleys.org.uk/msg11665.html
https://www.mail-archive.com/dnsmasq-discuss@lists.thekelleys.org.uk/msg11664.html
http://thekelleys.org.uk/dnsmasq/CHANGELOG
http://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commit;h=63437ffbb58837b214b4b92cb1c54bc5f3279928
https://access.redhat.com/security/vulnerabilities/3199382
https://security.googleblog.com/2017/10/behind-masq-yet-more-dns-and-dhcp.html

CPE    6
cpe:/o:debian:debian_linux:7.1
cpe:/o:debian:debian_linux:7.0
cpe:/o:canonical:ubuntu_linux:14.04::~~lts~~~
cpe:/o:redhat:enterprise_linux_workstation:7.0
...
CWE    1
CWE-20

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