XFree86 X11r6 up to 3.3.6 xlib DISPLAY memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability has been found in XFree86 X11r6 up to 3.3.6 and classified as problematic. The affected element is an unknown function in the library xlib. The manipulation of the argument DISPLAY as part of Environment Variable leads to memory corruption. This vulnerability is uniquely identified as CVE-2000-0976. Moreover, an exploit is present. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in XFree86 X11r6 up to 3.3.6 and classified as problematic. This issue affects an unknown part in the library xlib. The manipulation of the argument DISPLAY as part of a Environment Variable leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Buffer overflow in xlib in XFree 3.3.x possibly allows local users to execute arbitrary commands via a long DISPLAY environment variable or a -display command line parameter.

The weakness was disclosed 12/19/2000 by Michal Zalewski (Website). It is possible to read the advisory at archives.neohapsis.com. The identification of this vulnerability is CVE-2000-0976. The exploitation is known to be easy. Attacking locally is a requirement. No form of authentication is needed for a successful exploitation. Technical details as well as a public exploit are known.

The exploit is available at exploit-db.com. It is declared as proof-of-concept.

Upgrading to version 4.0 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (5751), Exploit-DB (20294) and SecurityFocus (BID 1805†). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.9
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: X11r6 4.0

Timelineinfo

10/12/2000 🔍
12/19/2000 +68 days 🔍
12/19/2000 +0 days 🔍
07/01/2014 +4942 days 🔍
01/26/2025 +3862 days 🔍

Sourcesinfo

Advisory: archives.neohapsis.com
Researcher: Michal Zalewski
Status: Confirmed

CVE: CVE-2000-0976 (🔍)
GCVE (CVE): GCVE-0-2000-0976
GCVE (VulDB): GCVE-100-16187
X-Force: 5751
SecurityFocus: 1805 - XFree86 Xlib Display Buffer Overflow Vulnerability

scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 07/02/2014 00:51
Updated: 01/26/2025 13:10
Changes: 07/02/2014 00:51 (42), 04/06/2019 14:52 (13), 06/09/2024 02:22 (17), 01/26/2025 13:10 (14)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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