CVE-2017-13704
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
High
EPSS
Percentile
97.9%
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 configurations
| Vendor | Product | Version | CPE |
|---|---|---|---|
| canonical | ubuntu_linux | 14.04 | cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* |
| canonical | ubuntu_linux | 16.04 | cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* |
| canonical | ubuntu_linux | 17.04 | cpe:2.3:o:canonical:ubuntu_linux:17.04:*:*:*:*:*:*:* |
| debian | debian_linux | 7.0 | cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* |
| debian | debian_linux | 7.1 | cpe:2.3:o:debian:debian_linux:7.1:*:*:*:*:*:*:* |
| debian | debian_linux | 9.0 | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* |
| fedoraproject | fedora | 27 | cpe:2.3:o:fedoraproject:fedora:27:*:*:*:*:*:*:* |
| novell | leap | 42.2 | cpe:2.3:o:novell:leap:42.2:*:*:*:*:*:*:* |
| novell | leap | 42.3 | cpe:2.3:o:novell:leap:42.3:*:*:*:*:*:*:* |
| redhat | enterprise_linux_desktop | 7.0 | cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* |
References
thekelleys.org.uk/dnsmasq/CHANGELOG
thekelleys.org.uk/gitweb/?p=dnsmasq.git%3Ba=commit%3Bh=63437ffbb58837b214b4b92cb1c54bc5f3279928
www.securityfocus.com/bid/101085
www.securityfocus.com/bid/101977
www.securitytracker.com/id/1039474
access.redhat.com/security/vulnerabilities/3199382
cert-portal.siemens.com/productcert/pdf/ssa-689071.pdf
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4TK6DWC53WSU6633EVZL7H4PCWBYHMHK/
security.googleblog.com/2017/10/behind-masq-yet-more-dns-and-dhcp.html
www.mail-archive.com/dnsmasq-discuss%40lists.thekelleys.org.uk/msg11664.html
www.mail-archive.com/dnsmasq-discuss%40lists.thekelleys.org.uk/msg11665.html
www.synology.com/support/security/Synology_SA_17_59_Dnsmasq
Related
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
High
EPSS
Percentile
97.9%