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Updated gnutls packages that fix four bugs are now available for Red Hat Enterprise Linux 6.
The gnutls packages provide the GNU Transport Layer Security (GnuTLS) library, which implements cryptographic algorithms and protocols such as SSL, TLS, and DTLS.
- Previously, the gnutls_priority_init.3 man page contained incorrect information on the gnutls-2.8.5-safe-renegotiation patch, particularly on special control keywords. The manual page has been updated to provide accurate information about the described subject.
- Prior to this update, the gnutls_x509_privkey_import() function failed to load private keys in the PKCS#8 format. Consequently, these keys were not processed by applications which use gnutls_x509_privkey_import(). This bug has been fixed, and gnutls_x509_privkey_import() now allows loading of private keys formatted in PKCS#8.
- Multiple bugs were present in the implementation of the TLS-1.2 protocol in the gnutls package. Consequently, gnutls was incompatible with clients and servers conforming to the TLS-1.2 protocol standard. With this update, the TLS-1.2 implementation has been fixed. As a result, the compatibility of gnutls with other TLS-1.2 clients and servers is now assured.
- Previously, the gnutls-cli-debug man page contained typographical errors and incorrect information on the command-line options. The manual page has been updated, and no longer contains the aforementioned errors.
All users of gnutls are advised to upgrade to these updated packages, which fix these bugs.
Updated gnutls packages that fix one security issue are now available for Red Hat Enterprise Linux 5 and 6.
The Red Hat Security Response Team has rated this update as having important security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link associated with the description below.
The GnuTLS library provides support for cryptographic algorithms and for protocols such as Transport Layer Security (TLS).
- It was discovered that the fix for the CVE-2013-1619 issue released via RHSA-2013:0588 introduced a regression in the way GnuTLS decrypted TLS/SSL encrypted records when CBC-mode cipher suites were used. A remote attacker could possibly use this flaw to crash a server or client application that uses GnuTLS.
Users of GnuTLS are advised to upgrade to these updated packages, which correct this issue. For the update to take effect, all applications linked to the GnuTLS library must be restarted.