GLSA 200510-19: cURL: NTLM username stack overflow

http://security.gentoo.org/

Severity:	normal
Title:	cURL: NTLM username stack overflow
Date:	10/22/2005
Bugs:	#109097
ID:	200510-19

Synopsis

cURL is vulnerable to a buffer overflow which could lead to the execution of arbitrary code.

Background

cURL is a command line tool and library for transferring files via many different protocols. It supports NTLM authentication to retrieve files from Windows-based systems.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
net-misc/curl	< 7.15.0	>= 7.15.0	All supported architectures

Description

iDEFENSE reported that insufficient bounds checking on a memcpy() of the supplied NTLM username can result in a stack overflow.

Impact

A remote attacker could setup a malicious server and entice an user to connect to it using a cURL client, potentially leading to the execution of arbitrary code with the permissions of the user running cURL.

Workaround

Disable NTLM authentication by not using the --anyauth or --ntlm options when using cURL (the command line version). Workarounds for programs that use the cURL library depend on the configuration options presented by those programs.

Resolution

All cURL users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-misc/curl-7.15.0"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200510-19.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.