libX11 up to 1.6.5 XListExtensions ListExt.c Variable out-of-bounds write

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

Summaryinfo

A vulnerability identified as critical has been detected in libX11 up to 1.6.5. Affected by this issue is the function XListExtensions of the file ListExt.c of the component XListExtensions. This manipulation as part of Variable causes out-of-bounds write. This vulnerability appears as CVE-2018-14600. The attack may be initiated remotely. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability has been found in libX11 up to 1.6.5 and classified as critical. Affected by this vulnerability is the function XListExtensions of the file ListExt.c of the component XListExtensions. The manipulation as part of a Variable 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. The summary by CVE is:

An issue was discovered in libX11 through 1.6.5. The function XListExtensions in ListExt.c interprets a variable as signed instead of unsigned, resulting in an out-of-bounds write (of up to 128 bytes), leading to DoS or remote code execution.

The bug was discovered 08/21/2018. The weakness was presented 08/24/2018 by Tobias Stoeckmann (oss-sec). It is possible to read the advisory at openwall.com. This vulnerability is known as CVE-2018-14600 since 07/26/2018. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 3 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 112184 (Debian DLA-1482-1 : libx11 security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 171544 (OpenSUSE Security Update for libX11 (openSUSE-SU-2018:2567-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 6 days after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (112184) and SecurityFocus (BID 105177†). See VDB-123221 and VDB-123222 for similar entries. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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Version

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

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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: 112184
Nessus Name: Debian DLA-1482-1 : libx11 security update
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: 🔍

Patch: cgit.freedesktop.org

Timelineinfo

07/26/2018 🔍
08/21/2018 +26 days 🔍
08/21/2018 +0 days 🔍
08/24/2018 +2 days 🔍
08/24/2018 +0 days 🔍
08/25/2018 +1 days 🔍
08/29/2018 +4 days 🔍
08/30/2018 +1 days 🔍
05/04/2023 +1708 days 🔍

Sourcesinfo

Advisory: RHSA-2019:2079
Researcher: Tobias Stoeckmann
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-14600 (🔍)
GCVE (CVE): GCVE-0-2018-14600
GCVE (VulDB): GCVE-100-123223
SecurityFocus: 105177 - X.Org libX11 'ListExt.c' Multiple Denial of Service Vulnerabilities
SecurityTracker: 1041543

See also: 🔍

Entryinfo

Created: 08/25/2018 08:37
Updated: 05/04/2023 14:15
Changes: 08/25/2018 08:37 (77), 03/18/2020 08:28 (6), 05/04/2023 14:15 (6)
Complete: 🔍
Cache ID: 216::103

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

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