cURL/libcurl: Buffer overflow in the handling of TFTP URLs

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200603-19 / curl
Release Date	March 21, 2006
Latest Revision	March 21, 2006: 01
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
net-misc/curl	< 7.15.3	revision >= 7.15.1-r1, >= 7.15.3, <= 7.14.1	All supported architectures

Related bugreports: #125766

Synopsis

libcurl is affected by a buffer overflow in the handling of URLs for the TFTP protocol, which could be exploited to compromise a user's system.

2. Impact Information

Background

cURL is a command line tool for transferring files with URL syntax, supporting numerous protocols. libcurl is the corresponding client-side library.

Description

Ulf Harnhammar reported a possible buffer overflow in the handling of TFTP URLs in libcurl due to the lack of boundary checks.

Impact

An attacker could exploit this vulnerability to compromise a user's system by enticing the user to request a malicious URL with cURL/libcurl or to use a HTTP server redirecting to a malicious TFTP 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-7.15.1-r1"

4. References

Updated March 21, 2006

Summary: This is a Gentoo Linux Security Advisory

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