CVE-2023-3823
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- CVE-2023-3823
CVE Details
| Release Date: | 2023-08-03 |
Description
In PHP versions 8.0.* before 8.0.30, 8.1.* before 8.1.22, and 8.2.* before 8.2.8 various XML functions rely on libxml global state to track configuration variables, like whether external entities are loaded. This state is assumed to be unchanged unless the user explicitly changes it by calling appropriate function. However, since the state is process-global, other modules - such as ImageMagick - may also use this library within the same process, and change that global state for their internal purposes, and leave it in a state where external entities loading is enabled. This can lead to the situation where external XML is parsed with external entities loaded, which can lead to disclosure of any local files accessible to PHP. This vulnerable state may persist in the same process across many requests, until the process is shut down.
See more information about CVE-2023-3823 from MITRE CVE dictionary and NIST NVD
CVSS v3.0 metrics
NOTE: The following CVSS v3.0 metrics and score provided are preliminary and subject to review.
| Base Score: | 7.5 | Base Metrics: | AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| Access Vector: | Network | Attack Complexity: | Low |
| Privileges Required: | None | User Interaction: | None |
| Scope: | Unchanged | Confidentiality Impact: | High |
| Integrity Impact: | None | Availability Impact: | None |
Errata information
| Platform | Errata | Release Date |
| Oracle Linux version 8 (libzip) | ELSA-2023-5927 | 2023-10-23 |
| Oracle Linux version 8 (php) | ELSA-2023-5927 | 2023-10-23 |
| Oracle Linux version 8 (php-pear) | ELSA-2023-5927 | 2023-10-23 |
| Oracle Linux version 8 (php-pecl-apcu) | ELSA-2023-5927 | 2023-10-23 |
| Oracle Linux version 8 (php-pecl-rrd) | ELSA-2023-5927 | 2023-10-23 |
| Oracle Linux version 8 (php-pecl-xdebug3) | ELSA-2023-5927 | 2023-10-23 |
| Oracle Linux version 8 (php-pecl-zip) | ELSA-2023-5927 | 2023-10-23 |
| Oracle Linux version 9 (php) | ELSA-2023-5926 | 2023-10-22 |
| Oracle Linux version 9 (php) | ELSA-2024-0387 | 2024-01-25 |
| Oracle Linux version 9 (php-pecl-apcu) | ELSA-2024-0387 | 2024-01-25 |
| Oracle Linux version 9 (php-pecl-rrd) | ELSA-2024-0387 | 2024-01-25 |
| Oracle Linux version 9 (php-pecl-xdebug3) | ELSA-2024-0387 | 2024-01-25 |
| Oracle Linux version 9 (php-pecl-zip) | ELSA-2024-0387 | 2024-01-25 |
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