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Mozilla Network Security Service: Remote execution of arbitrary code


1.  Gentoo Linux Security Advisory

Version Information

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


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


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.


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


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


Disable the SSLv2 protocol in the applications using NSS.


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


Page updated March 20, 2007

Summary: This is a Gentoo Linux Security Advisory

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