XFree86 X 6.8.2 scan_cidfont integer coercion

CVSS Meta Temp Score
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CTI Interest Score
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8.4$0-$5k0.00

A vulnerability has been found in XFree86 X 6.8.2 and classified as critical. Affected by this vulnerability is the function scan_cidfont. The manipulation with an unknown input leads to a integer coercion vulnerability. The CWE definition for the vulnerability is CWE-192. Integer coercion refers to a set of flaws pertaining to the type casting, extension, or truncation of primitive data types. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Integer overflow in the scan_cidfont function in X.Org 6.8.2 and XFree86 X server allows local users to execute arbitrary code via crafted (1) CMap and (2) CIDFont font data with modified item counts in the (a) begincodespacerange, (b) cidrange, and (c) notdefrange sections.

The bug was discovered 09/12/2006. The weakness was presented 09/12/2006 by iDefense with iDEFENSE (Website). The advisory is shared at redhat.com. This vulnerability is known as CVE-2006-3740 since 07/20/2006. The exploitation appears to be easy. An attack has to be approached locally. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available.

It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 22339 (CentOS 4 : xorg-x11 (CESA-2006:0665)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 156240 (Oracle Enterprise Linux Update for X.org (ELSA-2006:0665)).

Upgrading eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (28890) and Tenable (22339). See 2534 and 2535 for similar entries.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

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CVSSv3info

VulDB Meta Base Score: 9.3
VulDB Meta Temp Score: 8.4

VulDB Base Score: 9.3
VulDB Temp Score: 8.4
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CVSSv2info

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Exploitinginfo

Class: Integer coercion
CWE: CWE-192 / CWE-189
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔍
Status: Proof-of-Concept

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Nessus ID: 22339
Nessus Name: CentOS 4 : xorg-x11 (CESA-2006:0665)
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OpenVAS ID: 58696
OpenVAS Name: Debian Security Advisory DSA 1193-1 (xfree86)
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Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Upgrade
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Timelineinfo

07/20/2006 🔍
09/12/2006 +54 days 🔍
09/12/2006 +0 days 🔍
09/12/2006 +0 days 🔍
09/12/2006 +0 days 🔍
09/12/2006 +0 days 🔍
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09/12/2006 +0 days 🔍
09/13/2006 +1 days 🔍
09/14/2006 +1 days 🔍
09/18/2006 +4 days 🔍
03/12/2015 +3097 days 🔍
06/25/2019 +1566 days 🔍

Sourcesinfo

Advisory: redhat.com
Researcher: iDefense
Organization: iDEFENSE
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2006-3740 (🔍)
OVAL: 🔍

X-Force: 28890
SecurityTracker: 1016828
Vulnerability Center: 12703 - X.Org and XFree86 Servers Local Code Execution via Crafted Cmap and CIDFont Font Data, Medium
SecurityFocus: 19974 - X.Org LibXfont CID Font File Multiple Integer Overflow Vulnerabilities
Secunia: 21864 - X11 libXfont CID Encoded Fonts Integer Overflows, Less Critical
OSVDB: 28738 - CVE-2006-3740 - X.Org - Integer Overflow Issue
Vupen: ADV-2006-3581

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Entryinfo

Created: 03/12/2015 15:51
Updated: 06/25/2019 12:34
Changes: 03/12/2015 15:51 (83), 06/25/2019 12:34 (5)
Complete: 🔍

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