X.org libX11 out-of-bounds write

CVSS Meta Temp Score
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CTI Interest Score
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9.6$0-$5k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in X.org libX11. This impacts an unknown function. Executing a manipulation can lead to out-of-bounds write. The identification of this vulnerability is CVE-2016-7943. The attack may be launched remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in X.org libX11 (affected version unknown). It has been declared as critical. This vulnerability affects an unknown functionality. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. The CWE definition for the vulnerability is CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

The XListFonts function in X.org libX11 before 1.6.4 might allow remote X servers to gain privileges via vectors involving length fields, which trigger out-of-bounds write operations.

The weakness was shared 10/05/2016 by Tobias Stoeckmann with OpenBSD (Website). The advisory is shared for download at openwall.com. The vendor cooperated in the coordination of the public release. This vulnerability was named CVE-2016-7943 since 09/09/2016. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 94774 (Fedora 25 : libX11 (2016-0df69ab477)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 276193 (Fedora Security Update for libX11 (FEDORA-2016-0df69ab477)).

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 Tenable (94774), SecurityFocus (BID 93362†) and SecurityTracker (ID 1036945†). The entries VDB-92463, VDB-92465, VDB-92466 and VDB-92467 are related to this item. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 9.6

VulDB Base Score: 9.8
VulDB Temp Score: 9.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 94774
Nessus Name: Fedora 25 : libX11 (2016-0df69ab477)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 860161
OpenVAS Name: Fedora Update for libX11 FEDORA-2016-0df69ab477
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: cgit.freedesktop.org

Timelineinfo

09/09/2016 🔍
10/04/2016 +25 days 🔍
10/05/2016 +1 days 🔍
10/05/2016 +0 days 🔍
10/05/2016 +0 days 🔍
10/06/2016 +1 days 🔍
11/15/2016 +40 days 🔍
12/13/2016 +28 days 🔍
09/22/2022 +2109 days 🔍

Sourcesinfo

Vendor: x.org

Advisory: FEDORA-2016-0df69ab477
Researcher: Tobias Stoeckmann
Organization: OpenBSD
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2016-7943 (🔍)
GCVE (CVE): GCVE-0-2016-7943
GCVE (VulDB): GCVE-100-92464
SecurityFocus: 93362 - X.Org libX11 CVE-2016-7943 Memory Corruption Vulnerability
SecurityTracker: 1036945

See also: 🔍

Entryinfo

Created: 10/06/2016 21:12
Updated: 09/22/2022 14:28
Changes: 10/06/2016 21:12 (69), 05/03/2019 22:26 (12), 09/22/2022 14:24 (5), 09/22/2022 14:28 (1)
Complete: 🔍
Cache ID: 216::103

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