Mozilla Network Security Service: Remote execution of arbitrary code

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200703-22 / nss
Release Date	March 20, 2007
Latest Revision	March 20, 2007: 01
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
dev-libs/nss	< 3.11.5	>= 3.11.5	All supported architectures

Related bugreports: #165555

Synopsis

The Mozilla Network Security Services libraries are vulnerable to two buffer overflows that could result in the remote execution of arbitrary code.

2. Impact Information

Background

The Mozilla Network Security Service is a library implementing security features like SSL v2/v3, TLS, PKCS #5, PKCS #7, PKCS #11, PKCS #12, S/MIME and X.509 certificates.

Description

iDefense has reported two potential buffer overflow vulnerabilities found by researcher "regenrecht" in the code implementing the SSLv2 protocol.

Impact

A remote attacker could send a specially crafted SSL master key to a server using NSS for the SSLv2 protocol, or entice a user to connect to a malicious server with a client-side application using NSS like one of the Mozilla products. This could trigger the vulnerabilities and result in the possible execution of arbitrary code with the rights of the vulnerable application.

3. Resolution Information

Workaround

Disable the SSLv2 protocol in the applications using NSS.

Resolution

All NSS users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-libs/nss-3.11.5"

4. References

Updated March 20, 2007

Summary: This is a Gentoo Linux Security Advisory

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