cURL: Arbitrary file access

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200903-21 / curl
Release Date	March 09, 2009
Latest Revision	March 09, 2009: 01
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
net-misc/curl	< 7.19.4	>= 7.19.4	All supported architectures

Related bugreports: #260361

Synopsis

A vulnerability in cURL may allow for arbitrary file access.

2. Impact Information

Background

cURL is a command line tool for transferring files with URL syntax, supporting numerous protocols.

Description

David Kierznowski reported that the redirect implementation accepts arbitrary Location values when CURLOPT_FOLLOWLOCATION is enabled.

Impact

A remote attacker could possibly exploit this vulnerability to make remote HTTP servers trigger arbitrary requests to intranet servers and read or overwrite arbitrary files via a redirect to a file: URL, or, if the libssh2 USE flag is enabled, execute arbitrary commands via a redirect to an scp: URL.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All cURL users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/curl-7.19.4"

4. References

CVE-2009-0037

Page updated March 09, 2009

Summary: This is a Gentoo Linux Security Advisory

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