WebkitGTK+ 2.20.3 xdgmimecache.c out-of-bounds write

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.4$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in WebkitGTK+ 2.20.3. Impacted is an unknown function of the file ThirdParty/xdgmime/src/xdgmimecache.c. The manipulation results in out-of-bounds write. This vulnerability is reported as CVE-2018-12911. The attack can be launched remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in WebkitGTK+ 2.20.3 (Web Browser). Affected is an unknown functionality of the file ThirdParty/xdgmime/src/xdgmimecache.c. 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. CVE summarizes:

WebKitGTK+ 2.20.3 has an off-by-one error, with a resultant out-of-bounds write, in the get_simple_globs functions in ThirdParty/xdgmime/src/xdgmimecache.c and ThirdParty/xdgmime/src/xdgmimeglob.c.

The bug was discovered 06/30/2018. The weakness was disclosed 07/19/2018 by Jeonghoon Shin (OSS-Fuzz) with Theori (Website). The advisory is available at trac.webkit.org. This vulnerability is traded as CVE-2018-12911 since 06/27/2018. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 19 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 111843 (Ubuntu 16.04 LTS / 18.04 LTS : webkit2gtk vulnerabilities (USN-3743-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 171677 (SUSE Enterprise Linux Security Update for webkit2gtk3 (SUSE-SU-2018:3387-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 4 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (111843) and SecurityFocus (BID 102775†). The entries VDB-111120, VDB-111127, VDB-111128 and VDB-111129 are pretty similar. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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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: 111843
Nessus Name: Ubuntu 16.04 LTS / 18.04 LTS : webkit2gtk vulnerabilities (USN-3743-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Timelineinfo

01/23/2018 🔍
06/27/2018 +155 days 🔍
06/30/2018 +3 days 🔍
07/19/2018 +18 days 🔍
07/19/2018 +0 days 🔍
07/19/2018 +0 days 🔍
08/16/2018 +28 days 🔍
08/17/2018 +1 days 🔍
04/18/2023 +1705 days 🔍

Sourcesinfo

Advisory: USN-3743-1
Researcher: Jeonghoon Shin (OSS-Fuzz)
Organization: Theori
Status: Confirmed

CVE: CVE-2018-12911 (🔍)
GCVE (CVE): GCVE-0-2018-12911
GCVE (VulDB): GCVE-100-121962
SecurityFocus: 102775 - WebKit Multiple Memory Corruption Vulnerabilities

See also: 🔍

Entryinfo

Created: 07/19/2018 19:31
Updated: 04/18/2023 16:01
Changes: 07/19/2018 19:31 (73), 03/08/2020 16:28 (8), 04/18/2023 15:50 (4), 04/18/2023 15:56 (1), 04/18/2023 16:01 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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