| Revision Date: | 2006-09-14 | Version: | 637 |
| Title: | RHSA-2006:0680: gnutls security update (Important) |
| Description: | The GnuTLS Library provides support for cryptographic algorithms and protocols such as TLS. GnuTLS includes libtasn1, a library developed for ASN.1 structures management that includes DER encoding and decoding.
Daniel Bleichenbacher recently described an attack on PKCS #1 v1.5 signatures. Where an RSA key with exponent 3 is used it may be possible for an attacker to forge a PKCS #1 v1.5 signature that would be incorrectly verified by implementations that do not check for excess data in the RSA exponentiation result of the signature.
The core GnuTLS team discovered that GnuTLS is vulnerable to a variant of the Bleichenbacker attack. This issue affects applications that use GnuTLS to verify X.509 certificates as well as other uses of PKCS #1 v1.5. (CVE-2006-4790)
In Red Hat Enterprise Linux 4, the GnuTLS library is only used by the Evolution client when connecting to an Exchange server or when publishing calendar information to a WebDAV server.
Users are advised to upgrade to these updated packages, which contain a backported patch from the GnuTLS maintainers to correct this issue.
|
| Family: | unix | Class: | patch |
| Status: | | Reference(s): | CVE-2006-4790
RHSA-2006:0680
RHSA-2006:0680-01
RHSA-2006:0680-01
|
| Platform(s): | Red Hat Enterprise Linux 4
| Product(s): | |
| Definition Synopsis |
| Red Hat Enterprise Linux must be installed OR Package Information
Red Hat Enterprise Linux 4 is installed
AND
gnutls is earlier than 0:1.0.20-3.2.3
AND gnutls is signed with Red Hat redhatrelease2 key
gnutls-devel is earlier than 0:1.0.20-3.2.3
AND gnutls-devel is signed with Red Hat redhatrelease2 key
|