Network Security Services is a set of libraries designed to support the cross-platform development of security-enabled client and server applications. Netscape Portable Runtime provides platform independence for non-GUI operating system facilities. A flaw was found in the way NSS parsed ASN.1 input from certain RSA signatures. A remote attacker could use this flaw to forge RSA certificates by providing a specially crafted signature to an application using NSS. Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Antoine Delignat-Lavaud and Intel Product Security Incident Response Team as the original reporters. All NSS users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. After installing this update, applications using NSS must be restarted for this update to take effect.