curl: NTLM response buffer overflow

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200503-20 / curl
Release Date	March 16, 2005
Latest Revision	March 16, 2005: 01
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
net-misc/curl	< 7.13.1	>= 7.13.1	All supported architectures

Related bugreports: #82534

Synopsis

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

2. Impact Information

Background

curl is a command line tool for transferring files via many different protocols.

Description

curl fails to properly check boundaries when handling NTLM authentication.

Impact

With a malicious server an attacker could send a carefully crafted NTLM response to a connecting client leading to the execution of arbitrary code with the permissions of the user running curl.

3. Resolution Information

Workaround

Disable NTLM authentication by not using the --anyauth or --ntlm options.

Resolution

All curl users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/curl-7.13.1"

4. References

CAN-2005-0490

Updated March 16, 2005

Summary: This is a Gentoo Linux Security Advisory

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