Input validation error in ISC BIND - CVE-2015-4620

 

Input validation error in ISC BIND - CVE-2015-4620

Published: July 8, 2015 / Updated: August 4, 2020


Vulnerability identifier: #VU33826
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2015-4620
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

name.c in named in ISC BIND 9.7.x through 9.9.x before 9.9.7-P1 and 9.10.x before 9.10.2-P2, when configured as a recursive resolver with DNSSEC validation, allows remote attackers to cause a denial of service (REQUIRE assertion failure and daemon exit) by constructing crafted zone data and then making a query for a name in that zone.


Affected software

ISC BIND
Gentoo Linux
Amazon Linux AMI
SUSE Linux
Slackware Linux
Fedora
bind (Alpine package)
bind

How to mitigate CVE-2015-4620

Install update from vendor's website.

bind (Alpine package) - update to 9.9.7_p2-r0
bind - addressed in versions 9.9.6-9.P1.fc21, 9.10.2-3.P2.fc22

External References

Related Security Bulletins