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 was found in X.org libX11. It has been rated as problematic. This affects an unknown function. Performing a manipulation results in out-of-bounds write. This vulnerability was named CVE-2016-7942. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in X.org libX11 (version unknown). It has been classified as critical. This affects an unknown function. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. CWE is classifying the issue as CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

The XGetImage function in X.org libX11 before 1.6.4 might allow remote X servers to gain privileges via vectors involving image type and geometry, which triggers out-of-bounds read operations.

The weakness was presented 10/05/2016 by Tobias Stoeckmann with OpenBSD (Website). It is possible to read the advisory at openwall.com. The public release was coordinated in cooperation with X.org. This vulnerability is uniquely identified as CVE-2016-7942 since 09/09/2016. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not 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 169243 (SUSE Enterprise Linux Security Update for X Window System client libraries (SUSE-SU-2016:2505-1)).

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 93363†) and SecurityTracker (ID 1036945†). See VDB-92464, VDB-92465, VDB-92466 and VDB-92467 for similar entries. Be aware that VulDB is the high quality source for vulnerability data.

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: USN-3758-1
Researcher: Tobias Stoeckmann
Organization: OpenBSD
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2016-7942 (🔍)
GCVE (CVE): GCVE-0-2016-7942
GCVE (VulDB): GCVE-100-92463
SecurityFocus: 93363 - X.Org libX11 CVE-2016-7942 Memory Corruption Vulnerability
SecurityTracker: 1036945

See also: 🔍

Entryinfo

Created: 10/06/2016 21:12
Updated: 09/22/2022 14:20
Changes: 10/06/2016 21:12 (69), 05/03/2019 22:19 (12), 09/22/2022 14:20 (5)
Complete: 🔍
Cache ID: 216:FAE:103

Be aware that VulDB is the high quality source for vulnerability data.

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