GLSA 201611-10: libuv: Privilege escalation

http://security.gentoo.org/

Severity:	normal
Title:	libuv: Privilege escalation
Date:	11/17/2016
Bugs:	#540826
ID:	201611-10

Synopsis

A vulnerability in libuv could lead to privilege escalation.

Background

libuv is a multi-platform support library with a focus on asynchronous I/O.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
dev-libs/libuv	< 1.4.2	>= 1.4.2	All supported architectures

Description

It was discovered that libuv does not call setgroups before calling setuid/setgid. If this is not called, then even though the uid has been dropped, there may still be groups associated that permit superuser privileges.

Impact

Context-dependent attackers could escalate privileges via unspecified vectors.

Workaround

There is no known workaround at this time.

Resolution

All libuv users should upgrade to the latest version:

      # emerge --sync
      # emerge --ask --verbose --oneshot ">=dev-libs/libuv-1.4.2"

References

CVE-2015-0278

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-201611-10.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.