GLSA 202101-38: NSD: Symbolic link traversal

http://security.gentoo.org/

Severity:	normal
Title:	NSD: Symbolic link traversal
Date:	01/29/2021
Bugs:	#758977
ID:	202101-38

Synopsis

A vulnerability was discovered in NSD which could allow a local attacker to cause a Denial of Service condition.

Background

An authoritative only, high performance, open source name server

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
net-dns/nsd	< 4.3.4	>= 4.3.4	All supported architectures

Description

A local vulnerability was discovered that would allow for a local symlink attack due to how NSD handles PID files.

Impact

A local attacker could cause a Denial of Service condition.

Workaround

There is no known workaround at this time.

Resolution

All NSD users should upgrade to the latest version:

      # emerge --sync
      # emerge --ask --oneshot --verbose ">=net-dns/nsd-4.3.4"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-202101-38.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.