Ubuntu 8.04 LTS / 10.04 LTS / 10.10 / 11.04 : curl vulnerabilities (USN-1158-1)

High Nessus Plugin ID 55414


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


Richard Silverman discovered that when doing GSSAPI authentication, libcurl unconditionally performs credential delegation, handing the server a copy of the client's security credential. (CVE-2011-2192)

Wesley Miaw discovered that when zlib is enabled, libcurl does not properly restrict the amount of callback data sent to an application that requests automatic decompression. This might allow an attacker to cause a denial of service via an application crash or possibly execute arbitrary code with the privilege of the application. This issue only affected Ubuntu 8.04 LTS and Ubuntu 10.04 LTS. (CVE-2010-0734)

USN 818-1 fixed an issue with curl's handling of SSL certificates with zero bytes in the Common Name. Due to a packaging error, the fix for this issue was not being applied during the build. This issue only affected Ubuntu 8.04 LTS. We apologize for the error. (CVE-2009-2417)

Scott Cantor discovered that curl did not correctly handle SSL certificates with zero bytes in the Common Name. A remote attacker could exploit this to perform a man in the middle attack to view sensitive information or alter encrypted communications.

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 libcurl3, libcurl3-gnutls and / or libcurl3-nss packages.

Plugin Details

Severity: High

ID: 55414

File Name: ubuntu_USN-1158-1.nasl

Version: $Revision: 1.5 $

Type: local

Agent: unix

Published: 2011/06/24

Modified: 2016/05/26

Dependencies: 12634

Risk Information

Risk Factor: High


Base Score: 7.5

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

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:libcurl3, p-cpe:/a:canonical:ubuntu_linux:libcurl3-gnutls, p-cpe:/a:canonical:ubuntu_linux:libcurl3-nss, cpe:/o:canonical:ubuntu_linux:10.04:-:lts, cpe:/o:canonical:ubuntu_linux:10.10, cpe:/o:canonical:ubuntu_linux:11.04, cpe:/o:canonical:ubuntu_linux:8.04:-:lts

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

Patch Publication Date: 2011/06/23

Reference Information

CVE: CVE-2009-2417, CVE-2010-0734, CVE-2011-2192

OSVDB: 56994, 62217, 73328, 73686

USN: 1158-1

CWE: 310