src/network/ssl/qsslcertificate.cpp in Nokia Trolltech Qt 4.x does not properly handle a '\0' character in a domain name in the Subject Alternative Name field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408.

This update fixes the handling of the subjectAltName field in SSL certificates. (CVE-2009-2700)

Several vulnerabilities have been discovered in qt4-x11, a cross-platform C++ application framework. The Common Vulnerabilities and Exposures project identifies the following problems :

  - CVE-2009-0945     Array index error in the insertItemBefore method in     WebKit, as used in qt4-x11, allows remote attackers to     execute arbitrary code.

  - CVE-2009-1687     The JavaScript garbage collector in WebKit, as used in     qt4-x11 does not properly handle allocation failures,     which allows remote attackers to execute arbitrary code     or cause a denial of service (memory corruption and     application crash) via a crafted HTML document that     triggers write access to an 'offset of a NULL pointer.

  - CVE-2009-1690     Use-after-free vulnerability in WebKit, as used in     qt4-x11, allows remote attackers to execute arbitrary     code or cause a denial of service (memory corruption and     application crash) by setting an unspecified property of     an HTML tag that causes child elements to be freed and     later accessed when an HTML error occurs.

  - CVE-2009-1698     WebKit in qt4-x11 does not initialize a pointer during     handling of a Cascading Style Sheets (CSS) attr function     call with a large numerical argument, which allows     remote attackers to execute arbitrary code or cause a     denial of service (memory corruption and application     crash) via a crafted HTML document.

  - CVE-2009-1699     The XSL stylesheet implementation in WebKit, as used in     qt4-x11 does not properly handle XML external entities,     which allows remote attackers to read arbitrary files     via a crafted DTD.

  - CVE-2009-1711     WebKit in qt4-x11 does not properly initialize memory     for Attr DOM objects, which allows remote attackers to     execute arbitrary code or cause a denial of service     (application crash) via a crafted HTML document.

  - CVE-2009-1712     WebKit in qt4-x11 does not prevent remote loading of     local Java applets, which allows remote attackers to     execute arbitrary code, gain privileges, or obtain     sensitive information via an APPLET or OBJECT element.

  - CVE-2009-1713     The XSLT functionality in WebKit, as used in qt4-x11     does not properly implement the document function, which     allows remote attackers to read arbitrary local files     and files from different security zones.

  - CVE-2009-1725     WebKit in qt4-x11 does not properly handle numeric     character references, which allows remote attackers to     execute arbitrary code or cause a denial of service     (memory corruption and application crash) via a crafted     HTML document.

  - CVE-2009-2700     qt4-x11 does not properly handle a '\0' character in a     domain name in the Subject Alternative Name field of an     X.509 certificate, which allows man-in-the-middle     attackers to spoof arbitrary SSL servers via a crafted     certificate issued by a legitimate Certification     Authority.

The oldstable distribution (etch) is not affected by these problems.

It was discovered that Qt did not properly handle certificates with NULL characters in the Subject Alternative 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. (CVE-2009-2700).

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.

A vulnerability has been found and corrected in qt4 :

src/network/ssl/qsslcertificate.cpp in Nokia Trolltech Qt 4.x does not properly handle a '&#0;' character in a domain name in the Subject Alternative Name field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408 (CVE-2009-2700).

This update provides a solution to this vulnerability.

security fix for CVE-2009-2700

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

ID	Name	Product	Family	Severity
49844	SuSE 10 Security Update : Qt3 (ZYPP Patch Number 6645)	Nessus	SuSE Local Security Checks	medium
44852	Debian DSA-1988-1 : qt4-x11 - several vulnerabilities	Nessus	Debian Local Security Checks	high
42794	SuSE 10 Security Update : Qt3 (ZYPP Patch Number 6644)	Nessus	SuSE Local Security Checks	medium
42793	SuSE 11 Security Update : libqt4 (SAT Patch Number 1522)	Nessus	SuSE Local Security Checks	medium
42792	openSUSE Security Update : libqt4 (libqt4-1521)	Nessus	SuSE Local Security Checks	medium
42791	openSUSE Security Update : libqt4 (libqt4-1521)	Nessus	SuSE Local Security Checks	medium
40944	Ubuntu 8.04 LTS / 8.10 / 9.04 : qt4-x11 vulnerability (USN-829-1)	Nessus	Ubuntu Local Security Checks	medium
40900	Mandriva Linux Security Advisory : qt4 (MDVSA-2009:225)	Nessus	Mandriva Local Security Checks	medium
40856	Fedora 10 : qt-4.5.2-3.fc10 (2009-9232)	Nessus	Fedora Local Security Checks	medium
40855	Fedora 11 : qt-4.5.2-3.fc11 (2009-9231)	Nessus	Fedora Local Security Checks	medium

Detections

Analytics

CVE-2009-2700

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