GNU screen Signal socket.c CheckPid race condition

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability was found in GNU screen. It has been declared as critical. This affects the function CheckPid of the file socket.c of the component Signal Handler. Such manipulation leads to race condition. This vulnerability is listed as CVE-2025-46805. The attack must be carried out locally. There is no available exploit.

Detailsinfo

A vulnerability was found in GNU screen (version now known). It has been rated as critical. Affected by this issue is the function CheckPid of the file socket.c of the component Signal Handler. The manipulation with an unknown input leads to a race condition vulnerability. Using CWE to declare the problem leads to CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Screen version 5.0.0 and older version 4 releases have a TOCTOU race potentially allowing to send SIGHUP, SIGCONT to privileged processes when installed setuid-root.

The advisory is shared for download at bugzilla.redhat.com. This vulnerability is handled as CVE-2025-46805 since 04/30/2025. The exploitation is known to be difficult. The attack needs to be approached locally. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 242468 (EulerOS 2.0 SP12 : screen (EulerOS-SA-2025-1841)), which helps to determine the existence of the flaw in a target environment.

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 databases at Tenable (242468) and CERT Bund (WID-SEC-2025-1850). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • Xerox FreeFlow Print Server

Productinfo

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔍
CNA CVSS-BT Score: 🔍
CNA Vector: 🔍

CVSSv3info

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

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

CNA Base Score: 5.5
CNA Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Race condition
CWE: CWE-362
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 242468
Nessus Name: EulerOS 2.0 SP12 : screen (EulerOS-SA-2025-1841)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

04/30/2025 🔍
05/14/2025 +14 days 🔍
05/14/2025 +0 days 🔍
08/16/2025 +94 days 🔍

Sourcesinfo

Vendor: gnu.org

Advisory: bugzilla.redhat.com
Status: Confirmed

CVE: CVE-2025-46805 (🔍)
GCVE (CVE): GCVE-0-2025-46805
GCVE (VulDB): GCVE-100-308888
CERT Bund: WID-SEC-2025-1850 - Xerox FreeFlow Print Server: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff

Entryinfo

Created: 05/14/2025 08:43
Updated: 08/16/2025 11:43
Changes: 05/14/2025 08:43 (51), 05/26/2025 16:44 (24), 07/22/2025 05:00 (2), 08/16/2025 11:43 (7)
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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