GNU Screen up to 4.9.0 socket.c ReceiveMsg unnecessary privileges

CVSS Meta Temp Score
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CTI Interest Score
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4.7$0-$5k0.32

Summaryinfo

A vulnerability categorized as problematic has been discovered in GNU Screen up to 4.9.0. The affected element is the function ReceiveMsg of the file socket.c. Executing a manipulation can lead to unnecessary privileges. This vulnerability is tracked as CVE-2023-24626. The attack is restricted to local execution. Moreover, an exploit is present. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability classified as problematic was found in GNU Screen up to 4.9.0. This vulnerability affects the function ReceiveMsg of the file socket.c. The manipulation with an unknown input leads to a unnecessary privileges vulnerability. The CWE definition for the vulnerability is CWE-250. The product performs an operation at a privilege level that is higher than the minimum level required, which creates new weaknesses or amplifies the consequences of other weaknesses. As an impact it is known to affect availability. CVE summarizes:

socket.c in GNU Screen through 4.9.0, when installed setuid or setgid (the default on platforms such as Arch Linux and FreeBSD), allows local users to send a privileged SIGHUP signal to any PID, causing a denial of service or disruption of the target process.

The weakness was disclosed 04/08/2023 as 51252. The advisory is shared for download at exploit-db.com. This vulnerability was named CVE-2023-24626 since 01/30/2023. Technical details and also a public exploit are known. The MITRE ATT&CK project declares the attack technique as T1068.

It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 296747 (Ubuntu 22.04 LTS / 24.04 LTS : GNU Screen vulnerabilities (USN-7978-1)), which helps to determine the existence of the flaw in a target environment.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.savannah.gnu.org.

The vulnerability is also documented in the databases at Exploit-DB (51252) and Tenable (296747). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.9
VulDB Meta Temp Score: 4.7

VulDB Base Score: 3.3
VulDB Temp Score: 3.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Unnecessary privileges
CWE: CWE-250
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 296747
Nessus Name: Ubuntu 22.04 LTS / 24.04 LTS : GNU Screen vulnerabilities (USN-7978-1)

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: git.savannah.gnu.org

Timelineinfo

01/30/2023 🔍
04/08/2023 +67 days 🔍
04/08/2023 +0 days 🔍
01/28/2026 +1026 days 🔍

Sourcesinfo

Vendor: gnu.org

Advisory: 51252
Status: Confirmed

CVE: CVE-2023-24626 (🔍)
GCVE (CVE): GCVE-0-2023-24626
GCVE (VulDB): GCVE-100-225352
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 04/08/2023 14:44
Updated: 01/28/2026 19:20
Changes: 04/08/2023 14:44 (46), 04/26/2023 10:30 (11), 07/28/2024 09:15 (14), 01/28/2026 19:20 (3)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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