Ubuntu 5.04 / 5.10 / 6.06 LTS : gnutls11, gnutls12 vulnerability (USN-348-1)

Medium Nessus Plugin ID 27928


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


The GnuTLS library did not sufficiently check the padding of PKCS #1 v1.5 signatures if the exponent of the public key is 3 (which is widely used for CAs). This could be exploited to forge signatures without the need of the secret key.

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.


Update the affected packages.

Plugin Details

Severity: Medium

ID: 27928

File Name: ubuntu_USN-348-1.nasl

Version: $Revision: 1.12 $

Type: local

Agent: unix

Published: 2007/11/10

Modified: 2016/05/27

Dependencies: 12634

Risk Information

Risk Factor: Medium


Base Score: 5

Temporal Score: 4.3

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

Temporal Vector: CVSS2#E:ND/RL:OF/RC:C

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:gnutls-bin, p-cpe:/a:canonical:ubuntu_linux:libgnutls-dev, p-cpe:/a:canonical:ubuntu_linux:libgnutls11, p-cpe:/a:canonical:ubuntu_linux:libgnutls11-dbg, p-cpe:/a:canonical:ubuntu_linux:libgnutls11-dev, p-cpe:/a:canonical:ubuntu_linux:libgnutls12, p-cpe:/a:canonical:ubuntu_linux:libgnutls12-dbg, cpe:/o:canonical:ubuntu_linux:5.04, cpe:/o:canonical:ubuntu_linux:5.10, cpe:/o:canonical:ubuntu_linux:6.06:-:lts

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2006/09/18

Vulnerability Publication Date: 2006/09/08

Reference Information

CVE: CVE-2006-4790

BID: 20027

OSVDB: 28778

USN: 348-1