Out-of-bounds read in PowerDNS Recursor - CVE-2018-16855

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Main Vulnerability Database Vulnerabilities #VU16147

Out-of-bounds read in PowerDNS Recursor - CVE-2018-16855

Published: November 28, 2018 / Updated: November 28, 2018


Vulnerability identifier: #VU16147
CSH Severity: Low
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-2018-16855
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists due to out-of-bounds memory read while computing the hash of the query for a packet cache lookup. A remote attacker can send a specially crafted DNS query and cause the service to crash.


Affected software

PowerDNS Recursor
Arch Linux
Fedora
Opensuse
pdns-recursor (Alpine package)
pdns-recursor

How to mitigate CVE-2018-16855

Update to version 4.1.8.

PowerDNS Recursor - update to 4.1.8
pdns-recursor (Alpine package) - update to 4.1.8-r0
pdns-recursor - addressed in versions 4.1.8-1.el7, 4.1.8-1.fc28, 4.1.8-1.fc29

External References

Related Security Bulletins