nano: Multiple vulnerabilities

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 201006-08 / nano
Release Date	June 01, 2010
Latest Revision	June 01, 2010: 01
Impact	normal
Exploitable	local

Package	Vulnerable versions	Unaffected versions	Architecture(s)
app-editors/nano	< 2.2.4	>= 2.2.4	All supported architectures

Related bugreports: #315355

Synopsis

Race conditions when editing files could lead to symlink attacks or changes of ownerships of important files.

2. Impact Information

Background

nano is a GNU GPL'd Pico clone with more functionality.

Description

Multiple race condition vulnerabilities have been discovered in nano. For further information please consult the CVE entries referenced below.

Impact

Under certain conditions, a local, user-assisted attacker could possibly overwrite arbitrary files via a symlink attack on an attacker-owned file that is being edited by the victim, or change the ownership of arbitrary files.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All nano users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=app-editors/nano-2.2.4"

4. References

Page updated June 01, 2010

Summary: This is a Gentoo Linux Security Advisory

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