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CVE-2010-5076

Status Candidate

Overview

QSslSocket in Qt before 4.7.0-rc1 recognizes a wildcard IP address in the subject's Common Name field of an X.509 certificate, which might allow man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority.

Related Files

Ubuntu Security Notice USN-1504-1
Posted Jul 12, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1504-1 - It was discovered that Qt did not properly handle wildcard domain names or IP addresses in the Common Name field of X.509 certificates. An attacker could exploit this to perform a man in the middle attack to view sensitive information or alter encrypted communications. This issue only affected Ubuntu 10.04 LTS. A heap-based buffer overflow was discovered in the HarfBuzz module. If a user were tricked into opening a crafted font file in a Qt application, an attacker could cause a denial of service or possibly execute arbitrary code with the privileges of the user invoking the program. Various other issues were also addressed.

tags | advisory, denial of service, overflow, arbitrary
systems | linux, ubuntu
advisories | CVE-2010-5076, CVE-2011-3193, CVE-2011-3194, CVE-2010-5076, CVE-2011-3193, CVE-2011-3194
SHA-256 | 38f8026f04706275efcfb7cc11205b775caa2dd43f788cbc9c811568afc13863
Red Hat Security Advisory 2012-0880-04
Posted Jun 20, 2012
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2012-0880-04 - Qt is a software toolkit that simplifies the task of writing and maintaining GUI applications for the X Window System. HarfBuzz is an OpenType text shaping engine. A buffer overflow flaw was found in the harfbuzz module in Qt. If a user loaded a specially-crafted font file with an application linked against Qt, it could cause the application to crash or, possibly, execute arbitrary code with the privileges of the user running the application. A flaw was found in the way Qt handled X.509 certificates with IP address wildcards. An attacker able to obtain a certificate with a Common Name containing an IP wildcard could possibly use this flaw to impersonate an SSL server to client applications that are using Qt. This update also introduces more strict handling for hostname wildcard certificates by disallowing the wildcard character to match more than one hostname component.

tags | advisory, overflow, arbitrary
systems | linux, redhat
advisories | CVE-2010-5076, CVE-2011-3922
SHA-256 | 88fdefaee5d521cf6eb6d97528778445e48f16725d34e7207c5a2cb76e6cb77b
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