GLSA 201706-07: Libtirpc and RPCBind: Denial of Service

http://security.gentoo.org/

Severity:	normal
Title:	Libtirpc and RPCBind: Denial of Service
Date:	06/06/2017
Bugs:	#617472
ID:	201706-07

Synopsis

A vulnerability has been found in Libtirpc and RPCBind which may allow a remote attacker to cause a Denial of Service condition.

Background

The RPCBind utility is a server that converts RPC program numbers into universal addresses.

Libtirpc is a port of Suns Transport-Independent RPC library to Linux.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
net-nds/rpcbind	< 0.2.4-r1	>= 0.2.4-r1	All supported architectures
net-libs/libtirpc	< 1.0.1-r1	>= 1.0.1-r1	All supported architectures

Description

It was found that due to the way RPCBind uses libtirpc (libntirpc), a memory leak can occur when parsing specially crafted XDR messages.

Impact

A remote attacker could send thousands of messages to RPCBind, possibly resulting in a Denial of Service condition.

Workaround

There is no known workaround at this time.

Resolution

All RPCBind users should upgrade to the latest version:

      # emerge --sync
      # emerge --ask --oneshot --verbose ">=net-nds/rpcbind-0.2.4-r1"

All Libtirpc users should upgrade to the latest version:


      # emerge --sync
      # emerge --ask --oneshot --verbose ">=net-libs/libtirpc-1.0.1-r1"

References

CVE-2017-8779

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-201706-07.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.