Ubuntu 8.04 LTS / 8.10 / 9.04 : nss vulnerabilities (USN-810-1)

High Nessus Plugin ID 40490


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


Moxie Marlinspike discovered that NSS did not properly handle regular expressions in certificate names. A remote attacker could create a specially crafted certificate to cause a denial of service (via application crash) or execute arbitrary code as the user invoking the program. (CVE-2009-2404)

Moxie Marlinspike and Dan Kaminsky independently discovered that NSS did not properly handle certificates with NULL characters in the certificate name. An attacker could exploit this to perform a man in the middle attack to view sensitive information or alter encrypted communications. (CVE-2009-2408)

Dan Kaminsky discovered NSS would still accept certificates with MD2 hash signatures. As a result, an attacker could potentially create a malicious trusted certificate to impersonate another site.

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: High

ID: 40490

File Name: ubuntu_USN-810-1.nasl

Version: $Revision: 1.15 $

Type: local

Agent: unix

Published: 2009/08/05

Modified: 2016/12/01

Dependencies: 12634

Risk Information

Risk Factor: High


Base Score: 9.3

Temporal Score: 8.1

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

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

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:libnss3-0d, p-cpe:/a:canonical:ubuntu_linux:libnss3-1d, p-cpe:/a:canonical:ubuntu_linux:libnss3-1d-dbg, p-cpe:/a:canonical:ubuntu_linux:libnss3-dev, p-cpe:/a:canonical:ubuntu_linux:libnss3-tools, cpe:/o:canonical:ubuntu_linux:8.04:-:lts, cpe:/o:canonical:ubuntu_linux:8.10, cpe:/o:canonical:ubuntu_linux:9.04

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: 2009/08/04

Reference Information

CVE: CVE-2009-2404, CVE-2009-2408, CVE-2009-2409

BID: 35888, 35891

OSVDB: 56723, 56724, 56752

USN: 810-1

CWE: 119, 310