X.org X Server 1.20.4 ct.c_char XQueryKeymap 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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6.4$0-$5k0.00

A vulnerability, which was classified as critical, was found in X.org X Server 1.20.4. This affects the function XQueryKeymap of the file ct.c_char. 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:

In X.Org X Server 1.20.4, there is a stack-based buffer overflow in the function XQueryKeymap. For example, by sending ct.c_char 1000 times, an attacker can cause a denial of service (application crash) or possibly have unspecified other impact.

The weakness was disclosed 10/16/2019. This vulnerability is uniquely identified as CVE-2019-17624 since 10/16/2019. An attack has to be approached locally. No form of authentication is needed for exploitation. Technical details and a public exploit are known.

A public exploit has been developed by Marcelo Vázquez (s4vitar) in Python and been published immediately after the advisory. The exploit is shared for download at exploit-db.com. It is declared as proof-of-concept.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Exploit-DB (47507).

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
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
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Marcelo Vázquez (s4vitar)
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍
Exploit Delay Time: 🔍

Timelineinfo

10/16/2019 🔍
10/16/2019 +0 days 🔍
10/16/2019 +0 days 🔍
10/16/2019 +0 days 🔍
01/09/2024 +1546 days 🔍

Sourcesinfo

Vendor: x.org

Advisory: 154868
Status: Not defined

CVE: CVE-2019-17624 (🔍)
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 10/16/2019 15:04
Updated: 01/09/2024 08:12
Changes: 10/16/2019 15:04 (34), 10/18/2019 14:08 (1), 10/18/2019 14:09 (23), 01/09/2024 08:12 (8)
Complete: 🔍
Committer: misc

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