CVE-2025-14177
Description
A flaw was found in PHP. The getimagesize() function may leak uninitialized heap memory when processing images in multi-chunk mode, such as through php://filter. This vulnerability, caused by a bug in php_read_stream_all_chunks() that overwrites the buffer without advancing the pointer, allows an attacker to potentially disclose sensitive information from the server's memory. This could compromise the confidentiality of data on the affected server.
Statement
This vulnerability is rated Low for Red Hat. The flaw in PHP's getimagesize() function can lead to information disclosure by leaking uninitialized heap memory when processing multi-chunk images, potentially via php://filter. This affects the confidentiality of data on systems running affected PHP versions in Red Hat Enterprise Linux 8 (php:8.2/php), Red Hat Enterprise Linux 9 (php, php:8.2/php, php:8.3/php), and Red Hat Enterprise Linux 10 (php, php8.4). The PHP 7 streams for Red Hat Enterprise Linux 7 and 8 are not affected by this vulnerability as the way it reads and stores image metadata is implemented differently than how it's on affected PHP 8 versions.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 3.7 | 7.5 | N/A |
| Attack Vector | Network | Network | N/A |
| Attack Complexity | High | Low | N/A |
| Privileges Required | None | None | N/A |
| User Interaction | None | None | N/A |
| Scope | Unchanged | Unchanged | N/A |
| Confidentiality | Low | High | N/A |
| Integrity Impact | None | None | N/A |
| Availability Impact | None | None | N/A |
Vector
Red Hat: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
NVD: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Understanding the Weakness (CWE)
Confidentiality
Technical Impact: Read Memory
An attacker could get secret values such as cryptographic keys, PII, memory addresses, or other information that could be used in additional attacks.
Confidentiality
Technical Impact: Bypass Protection Mechanism
Out-of-bounds memory could contain memory addresses or other information that can be used to bypass ASLR and other protection mechanisms in order to improve the reliability of exploiting a separate weakness for code execution.
Availability
Technical Impact: DoS: Crash, Exit, or Restart
An attacker could cause a segmentation fault or crash by causing memory to be read outside of the bounds of the buffer. This is especially likely when the code reads a variable amount of data and assumes that a sentinel exists to stop the read operation, such as a NUL in a string.
Other
Technical Impact: Varies by Context
The read operation could produce other undefined or unexpected results.
Frequently Asked Questions
Not sure what something means? Check out our Security Glossary.
Want to get errata notifications? Sign up here.
