libX11 up to 1.6.5 XListExtensions ListExt.c Variable input validation

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.3$0-$5k0.00

Summaryinfo

A vulnerability was found in libX11 up to 1.6.5. It has been rated as problematic. Affected is an unknown function of the file ListExt.c of the component XListExtensions. The manipulation as part of Variable leads to input validation. This vulnerability is documented as CVE-2018-14598. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in libX11 up to 1.6.5. This issue affects an unknown function of the file ListExt.c of the component XListExtensions. The manipulation as part of a Variable leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is availability. The summary by CVE is:

An issue was discovered in XListExtensions in ListExt.c in libX11 through 1.6.5. A malicious server can send a reply in which the first string overflows, causing a variable to be set to NULL that will be freed later on, leading to DoS (segmentation fault).

The bug was discovered 08/21/2018. The weakness was released 08/24/2018 by Tobias Stoeckmann (oss-sec). The advisory is shared at openwall.com. The identification of this vulnerability is CVE-2018-14598 since 07/26/2018. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available.

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†). Entries connected to this vulnerability are available at VDB-123222 and VDB-123223. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

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-2018-14598 (🔍)
GCVE (CVE): GCVE-0-2018-14598
GCVE (VulDB): GCVE-100-123221
SecurityFocus: 105177 - X.Org libX11 'ListExt.c' Multiple Denial of Service Vulnerabilities
SecurityTracker: 1041543

See also: 🔍

Entryinfo

Created: 08/25/2018 08:36
Updated: 05/04/2023 14:08
Changes: 08/25/2018 08:36 (75), 03/18/2020 08:23 (6), 05/04/2023 14:08 (6)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Want to know what is going to be exploited?

We predict KEV entries!