Stack-based buffer overflow in NSD - CVE-2019-13207
Published: September 10, 2019
Vulnerability identifier: #VU20963
CSH Severity: High
CVSS v4: 8.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-13207
CWE-ID: CWE-121
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code or cause a denial of service (DoS) condition on a targeted system.
The vulnerability exists due to a boundary error in the "dname_concatenate()" function in "dname.c" file. A remote unauthenticated attacker can send a specially crafted request, trigger stack-based buffer overflow and crash the target application or execute arbitrary code on the target system.
Affected software
NSD
Fedora
nsd
Fedora
nsd
How to mitigate CVE-2019-13207
Install update from vendor's website.
NSD - update to 4.2.2
nsd - addressed in versions 4.2.2-1.el6, 4.2.2-1.el7, 4.2.2-1.el8, 4.2.2-1.fc30
nsd - addressed in versions 4.2.2-1.el6, 4.2.2-1.el7, 4.2.2-1.el8, 4.2.2-1.fc30