Input validation error in Unbound - CVE-2017-15105
Published: January 23, 2018 / Updated: July 17, 2020
Vulnerability identifier: #VU31359
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2017-15105
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 manipulate data.
A flaw was found in the way unbound before 1.6.8 validated wildcard-synthesized NSEC records. An improperly validated wildcard NSEC record could be used to prove the non-existence (NXDOMAIN answer) of an existing wildcard record, or trick unbound into accepting a NODATA proof.
Affected software
Unbound
Fedora
unbound
Fedora
unbound
How to mitigate CVE-2017-15105
Install update from vendor's website.
Unbound - update to 1.6.8
unbound - addressed in versions 1.6.8-1.fc26, 1.6.8-1.fc27
unbound - addressed in versions 1.6.8-1.fc26, 1.6.8-1.fc27