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CVE
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CVE-2017-13704Date: (C)2017-10-04   (M)2018-05-11


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.

CVSS Score and Metrics +CVSS Score and Metrics -

CVSS V3 Severity:CVSS V2 Severity:
CVSS Score : 7.5CVSS Score : 5.0
Exploit Score: 3.9Exploit Score: 10.0
Impact Score: 3.6Impact Score: 2.9
 
CVSS V3 Metrics:CVSS V2 Metrics:
Attack Vector: NETWORKAccess Vector: NETWORK
Attack Complexity: LOWAccess Complexity: LOW
Privileges Required: NONEAuthentication: NONE
User Interaction: NONEConfidentiality: NONE
Scope: UNCHANGEDIntegrity: NONE
Confidentiality: NONEAvailability: PARTIAL
Integrity: NONE 
Availability: HIGH 
  
Reference:
BID-101085
BID-101977
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://cert-portal.siemens.com/productcert/pdf/ssa-689071.pdf
https://security.googleblog.com/2017/10/behind-masq-yet-more-dns-and-dhcp.html
https://www.synology.com/support/security/Synology_SA_17_59_Dnsmasq

CPE    8
cpe:/o:debian:debian_linux:7.1
cpe:/o:redhat:enterprise_linux_workstation:7.0
cpe:/o:redhat:enterprise_linux_desktop:7.0
cpe:/o:redhat:enterprise_linux_server:7.0
...
CWE    1
CWE-20
OVAL    1
oval:org.secpod.oval:def:113555

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