RHEL 4 : gnutls (RHSA-2006:0680)

medium Nessus Plugin ID 22360

Synopsis

The remote Red Hat host is missing one or more security updates.

Description

Updated gnutls packages that fix a security issue are now available for Red Hat Enterprise Linux 4.

This update has been rated as having important security impact by the Red Hat Security Response Team.

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.

Solution

Update the affected gnutls and / or gnutls-devel packages.

Plugin Details

Severity: Medium

ID: 22360

File Name: redhat-RHSA-2006-0680.nasl

Version: 1.24

Type: local

Agent: unix

Family: Red Hat Local Security Checks

Published: 9/15/2006

Updated: 1/14/2021

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:gnutls-devel, cpe:/o:redhat:enterprise_linux:4, p-cpe:/a:redhat:enterprise_linux:gnutls

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 9/14/2006

Vulnerability Publication Date: 9/14/2006

Reference Information

CVE: CVE-2006-4790

BID: 20027

RHSA: 2006:0680

Detections

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