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GLSA-200609-15 : GnuTLS: RSA Signature Forgery

medium Nessus Plugin ID 22459

Synopsis

The remote Gentoo host is missing one or more security-related patches.

Description

The remote host is affected by the vulnerability described in GLSA-200609-15 (GnuTLS: RSA Signature Forgery)

 verify.c fails to properly handle excess data in digestAlgorithm.parameters field while generating a hash when using an RSA key with exponent 3. RSA keys that use exponent 3 are commonplace.
 Impact :

 Remote attackers could forge PKCS #1 v1.5 signatures that are signed with an RSA key, preventing GnuTLS from correctly verifying X.509 and other certificates that use PKCS.
 Workaround :

 There is no known workaround at this time.

Solution

All GnuTLS users should update both packages:
 # emerge --sync # emerge --update --ask --verbose '>=net-libs/gnutls-1.4.4'

See Also

https://security.gentoo.org/glsa/200609-15

Plugin Details

Severity: Medium

ID: 22459

File Name: gentoo_GLSA-200609-15.nasl

Version: 1.15

Type: local

Published: 9/27/2006

Updated: 1/6/2021

Supported Sensors: 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:gentoo:linux:gnutls, cpe:/o:gentoo:linux

Required KB Items: Host/local_checks_enabled, Host/Gentoo/release, Host/Gentoo/qpkg-list

Exploit Ease: No known exploits are available

Patch Publication Date: 9/26/2006

Vulnerability Publication Date: 9/8/2006

Reference Information

CVE: CVE-2006-4790

BID: 20027

GLSA: 200609-15