// For flags

CVE-2022-4900

Potential buffer overflow in php_cli_server_startup_workers

Severity Score

5.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

A vulnerability was found in PHP where setting the environment variable PHP_CLI_SERVER_WORKERS to a large value leads to a heap buffer overflow.

Se encontró una vulnerabilidad en PHP donde establecer la variable de entorno PHP_CLI_SERVER_WORKERS en un valor grande provoca un desbordamiento del búfer del heap.

USN-6757-1 fixed vulnerabilities in PHP. Unfortunately these fixes were incomplete for Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, and Ubuntu 23.10. This update fixes the problem. It was discovered that PHP incorrectly handled PHP_CLI_SERVER_WORKERS variable. An attacker could possibly use this issue to cause a crash or execute arbitrary code. This issue only affected Ubuntu 20.04 LTS, and Ubuntu 22.04 LTS.

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Local
Attack Complexity
Low
Authentication
Single
Confidentiality
None
Integrity
None
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2023-01-31 CVE Reserved
  • 2023-11-02 CVE Published
  • 2025-02-13 CVE Updated
  • 2025-03-30 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer
  • CWE-787: Out-of-bounds Write
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Php
Search vendor "Php"
 Php
Search vendor "Php" for product "Php"
--
Affected
in Redhat
Search vendor "Redhat"
 Software Collections
Search vendor "Redhat" for product "Software Collections"
--
Safe
Php
Search vendor "Php"
 Php
Search vendor "Php" for product "Php"
 8.1.0
Search vendor "Php" for product "Php" and version "8.1.0"
-
Affected
in Redhat
Search vendor "Redhat"
 Linux
Search vendor "Redhat" for product "Linux"
 9.0
Search vendor "Redhat" for product "Linux" and version "9.0"
-
Safe
Php
Search vendor "Php"
 Php
Search vendor "Php" for product "Php"
 8.0.0
Search vendor "Php" for product "Php" and version "8.0.0"
-
Affected
in Redhat
Search vendor "Redhat"
 Linux
Search vendor "Redhat" for product "Linux"
 8.0
Search vendor "Redhat" for product "Linux" and version "8.0"
-
Safe
Php
Search vendor "Php"
 Php
Search vendor "Php" for product "Php"
 7.4.0
Search vendor "Php" for product "Php" and version "7.4.0"
-
Affected
in Redhat
Search vendor "Redhat"
 Linux
Search vendor "Redhat" for product "Linux"
 8.0
Search vendor "Redhat" for product "Linux" and version "8.0"
-
Safe
Php
Search vendor "Php"
 Php
Search vendor "Php" for product "Php"
--
Affected
in Redhat
Search vendor "Redhat"
 Linux
Search vendor "Redhat" for product "Linux"
 6.0
Search vendor "Redhat" for product "Linux" and version "6.0"
-
Safe
Php
Search vendor "Php"
 Php
Search vendor "Php" for product "Php"
--
Affected
in Redhat
Search vendor "Redhat"
 Linux
Search vendor "Redhat" for product "Linux"
 7.0
Search vendor "Redhat" for product "Linux" and version "7.0"
-
Safe
Php
Search vendor "Php"
 Php
Search vendor "Php" for product "Php"
--
Affected
in Redhat
Search vendor "Redhat"
 Linux
Search vendor "Redhat" for product "Linux"
 9.0
Search vendor "Redhat" for product "Linux" and version "9.0"
-
Safe