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CVE-2023-43655

Remote Code Execution via web-accessible composer.phar

Published: Sep 29, 2023Updated: Apr 23, 2025 Sources: CVE List NVD GHSA BDUCWE-74
NVD MITRE
6.4CVSSMEDIUM
EPSS Score
1.4%
Top 31.5%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

Composer is a dependency manager for PHP. Users publishing a composer.phar to a public web-accessible server where the composer.phar can be executed as a php file may be subject to a remote code execution vulnerability if PHP also has `register_argc_argv` enabled in php.ini. Versions 2.6.4, 2.2.22 and 1.10.27 patch this vulnerability. Users are advised to upgrade. Users unable to upgrade should make sure `register_argc_argv` is disabled in php.ini, and avoid publishing composer.phar to the web as this is not best practice.

CVSS Vector Breakdown

AV:NAC:HPR:HUI:RS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:HPrivileges Required
High
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-74

Affected Products

РЕД ОСООО «Ред Софт»
On-premOS
Operating Systems / linux-distro
Astra Linux Special EditionООО «РусБИТех-Астра»
On-premOS
Operating Systems / linux-distro
Astra Linux Common EditionООО «РусБИТех-Астра»
On-premOS
Operating Systems / linux-distro
ОСОН ОСнова ОnyxАО «НППКТ»
On-premOS
Operating Systems / linux-distro
ComposerNils Adermann, Jordi Boggiano
Library
OSS Libraries / generic-library
ооо «ред софт»commercialRUOperating Systemsaka red soft
ооо «русбитех-астра»commercialRUOperating Systemsaka rusbitech-astra
ао «нппкт»commercialRUOperating Systems
nils adermann, jordi boggianoindividual-devDEOSS Librariesaka composer
and 5 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Execution
Initial Access
View detailed technique mapping

References

https://github.com/composer/composer/commit/4fce14795aba98e40b6c4f5047305aba17a6120d
github.com
https://github.com/composer/composer/commit/955a48e6319c8962e5cd421b07c00ab3c728968c
github.com
https://github.com/composer/composer/commit/95e091c921037b7b6564942845e7b738f6b95c9c
github.com
and 19 more references View all →

Timeline

Published
Sep 29, 2023
Last Updated
Apr 23, 2025

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