Mozilla IDN support buffer overflow

mozilla-url-bo (22207)

High Risk

Description:

Mozilla is vulnerable to a heap-based buffer overflow in the International Domain Name (IDN) support functionality. By sending a specially-crafted HTML file containing the 0xAD character in the domain name or persuading a user to visit a malicious Web site, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause the system to crash.

Platforms Affected:

• Canonical, Ubuntu 4.10
• Canonical, Ubuntu 5.04
• Debian, Debian Linux 3.1
• Gentoo, Linux
• MandrakeSoft, Mandrake Linux 10.1
• MandrakeSoft, Mandrake Linux 10.1 X86_64
• MandrakeSoft, Mandrake Linux 2006 X86_64
• MandrakeSoft, Mandrake Linux 2006
• MandrakeSoft, Mandrake Linux LE2005
• MandrakeSoft, Mandrake Linux LE2005 X86_64
• MandrakeSoft, Mandrake Linux Corporate Server 3.0 X86_64
• MandrakeSoft, Mandrake Linux Corporate Server 3.0
• Mozilla, Firefox 1.0
• Mozilla, Firefox 1.0.1
• Mozilla, Firefox 1.0.2
• Mozilla, Firefox 1.0.3
• Mozilla, Firefox 1.0.4
• Mozilla, Firefox 1.0.5
• Mozilla, Firefox 1.0.6
• Mozilla, Firefox 1.5 Beta1
• Mozilla, Mozilla Suite 1.7.11
• Netscape, Navigator 7.2
• Netscape, Navigator 8.0.3.3
• RedHat, Enterprise Linux 2.1 WS
• RedHat, Enterprise Linux 2.1 ES
• RedHat, Enterprise Linux 2.1 AS
• RedHat, Enterprise Linux 3 Desktop
• RedHat, Enterprise Linux 3 WS
• RedHat, Enterprise Linux 3 ES
• RedHat, Enterprise Linux 3 AS
• RedHat, Enterprise Linux 4 WS
• RedHat, Enterprise Linux 4 AS
• RedHat, Enterprise Linux 4 Desktop
• RedHat, Enterprise Linux 4 ES
• RedHat, Linux Advanced Workstation 2.1 Itanium

Remedy:

As a workaround for Mozilla and Netscape:

1. Type about:config into the address field and hit Enter.
2. In the Filter toolbar, type network.enableIDN.
3. Right click on the the network.enableIDN item and select Toggle to change value to false.

— OR —

For Debian GNU/Linux (Thunderbird):
Refer to DSA-868-1 for patch, upgrade, or suggested workaround information. See References.

For Debian GNU/Linux (Mozilla):
Refer to DSA-866-1 for patch, upgrade, or suggested workaround information. See References.

For Red Hat Linux (Thunderbird):
Refer to RHSA-2005:791-8 for patch, upgrade, or suggested workaround information. See References.

For Red Hat Linux (Firefox):
Refer to RHSA-2005:768-6 for patch, upgrade, or suggested workaround information. See References.

For Red Hat Linux:
Refer to RHSA-2005:769-8 for patch, upgrade, or suggested workaround information. See References.

For Gentoo Linux:
Refer to Gentoo Linux Security Announcement GLSA 2005-09-11 for patch, upgrade, or suggested workaround information. See References.

For Ubuntu Linux:
Refer to USN-181-1 for patch, upgrade or suggested workaround information See References.

For other distributions:
Contact your vendor for upgrade or patch information.

Consequences:

Gain Access

References:

• CIAC INFORMATION BULLETIN P-303, Firefox and Mozilla Buffer Overflow Vulnerability at http://www.ciac.org/ciac/bulletins/p-303.shtml.
• Full-Disclosure Mailing List: Fri Sep 09 2005 - 01:09:51 CDT, Mozilla Firefox "Host:" Buffer Overflow at http://archives.neohapsis.com/archives/fulldisclosure/2005-09/0229.html.
• MFSA 2005-57, IDN heap overrun using soft-hyphens at http://www.mozilla.org/security/announce/mfsa2005-57.html.
• Mozilla Firefox Download Web page, Firefox - Rediscover the web at http://www.mozilla.org/products/firefox/.
• Mozilla Suite Web page, Mozilla Suite- The All-in-One Internet Application Suite at http://www.mozilla.org/products/mozilla1.x/.
• Netscape Web site, The All New Netscape Browser 8.0 at http://browser.netscape.com/ns8/.
• BID-14784: Mozilla/Netscape/Firefox Browsers Domain Name Remote Buffer Overflow Vulnerability
• CVE-2005-2871: Buffer overflow in the International Domain Name (IDN) support in Mozilla Firefox 1.0.6 and earlier, and Netscape 8.0.3.3 and 7.2, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a hostname with all soft hyphens (character 0xAD), which is not properly handled by the NormalizeIDN call in nsStandardURL::BuildNormalizedSpec.
• DSA-837: mozilla-firefox -- buffer overflow
• DSA-866: mozilla -- several vulnerabilities
• DSA-868: mozilla-thunderbird -- several vulnerabilities
• FrSIRT/ADV-2005-1690: Mozilla Browsers Host: Parameter Remote Buffer Overflow Vulnerability
• FrSIRT/ADV-2005-1691: Netscape Host: Parameter Remote Buffer Overflow Vulnerability
• FrSIRT/ADV-2005-1824: Mozilla Suite and Firefox Multiple Code Execution Vulnerabilities
• GLSA-200509-11: Mozilla Suite, Mozilla Firefox: Multiple vulnerabilities
• MDKSA-2005:169: Updated mozilla-firefox packages fix multiple vulnerabilities
• MDKSA-2005:170: Updated mozilla packages fix multiple vulnerabilities
• MDKSA-2005:174: Updated mozilla-thunderbird packages fix multiple vulnerabilities
• RHSA-2005-768: firefox security update
• RHSA-2005-769: mozilla security update
• RHSA-2005-791: thunderbird security update
• SA16764: Firefox IDN URL Domain Name Buffer Overflow
• SA16766: Netscape IDN URL Domain Name Buffer Overflow
• SA16767: Mozilla IDN URL Domain Name Buffer Overflow
• SECTRACK ID: 1014877: Mozilla Firefox Buffer Overflow in Processing Hostnames May Let Remote Users Execute Arbitrary Code
• US-CERT VU#573857: Mozilla-based browsers contain a buffer overflow in handling URIs containing a malformed IDN hostname
• USN-181-1: Mozilla products vulnerability

Reported:

Sep 09, 2005

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