PHP up to 8.1.31/8.2.27/8.3.18/8.4.4 check_has_header denial of service

CVSS Meta Temp Score
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CTI Interest Score
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6.2$0-$5k0.00

Summaryinfo

A vulnerability was found in PHP up to 8.1.31/8.2.27/8.3.18/8.4.4. It has been rated as problematic. This vulnerability affects the function check_has_header. Performing a manipulation results in denial of service. This vulnerability is known as CVE-2025-1736. Remote exploitation of the attack is possible. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as problematic, was found in PHP up to 8.1.31/8.2.27/8.3.18/8.4.4. This affects the function check_has_header. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. The summary by CVE is:

In PHP from 8.1.* before 8.1.32, from 8.2.* before 8.2.28, from 8.3.* before 8.3.19, from 8.4.* before 8.4.5, when user-supplied headers are sent, the insufficient validation of the end-of-line characters may prevent certain headers from being sent or lead to certain headers be misinterpreted.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2025-1736. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 232748 (Debian dsa-5878 : libapache2-mod-php8.2 - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 8.1.32, 8.2.28, 8.3.19 or 8.4.5 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (232748) and CERT Bund (WID-SEC-2025-0566). Be aware that VulDB is the high quality source for vulnerability data.

Affected

  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Xerox FreeFlow Print Server
  • Oracle Linux
  • SUSE openSUSE
  • RESF Rocky Linux
  • NetApp Data ONTAP
  • Open Source PHP

Productinfo

Type

Name

Version

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: 6.2

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

NVD Base Score: 7.3
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Denial of service
CWE: CWE-404
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: 232748
Nessus Name: Debian dsa-5878 : libapache2-mod-php8.2 - security update

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: PHP 8.1.32/8.2.28/8.3.19/8.4.5

Timelineinfo

03/14/2025 🔍
03/14/2025 +0 days 🔍
02/11/2026 +334 days 🔍

Sourcesinfo

Product: php.org

Advisory: github.com
Status: Confirmed

CVE: CVE-2025-1736 (🔍)
GCVE (CVE): GCVE-0-2025-1736
GCVE (VulDB): GCVE-100-299775
CERT Bund: WID-SEC-2025-0566 - PHP: Mehrere Schwachstellen

Entryinfo

Created: 03/14/2025 20:39
Updated: 02/11/2026 14:54
Changes: 03/14/2025 20:39 (52), 03/15/2025 08:00 (2), 03/30/2025 08:34 (13), 05/24/2025 01:58 (1), 07/03/2025 05:31 (11), 09/13/2025 17:44 (7), 02/11/2026 14:54 (2)
Complete: 🔍
Cache ID: 216::103

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

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