CVE-2024-11233 is a security vulnerability associated with PHP's convert.quoted-printable-decode filter. The issue impacts PHP versions 8.1.* before 8.1.31, 8.2.* before 8.2.26, and 8.3.* before 8.3.14. An error in the filter leads to a buffer overread by one byte, which could cause crashes or disclose the content of other memory areas in certain circumstances. This blog post will provide a detailed explanation of the vulnerability, including code snippets and links to original references, as well as exploit details.
CVE Details and Affected Versions
CVE-2024-11233 is a bug in PHP's convert.quoted-printable-decode filter, which is used for converting input and output data to and from the quoted-printable encoding format. It is important to emphasize that this vulnerability affects PHP versions 8.1.* before 8.1.31, 8.2.* before 8.2.26, and 8.3.* before 8.3.14. If you are using any of these versions, you are advised to update your PHP installation immediately to one that includes the patch for this vulnerability.
Official references for this vulnerability can be found in the PHP bug tracker and the CVE database
- PHP Bug Tracker: https://bugs.php.net/bug.php?id=12345 (replace with actual bug ID)
- CVE Database: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-11233
Code Snippet
The following code snippet demonstrates the problematic behavior of the convert.quoted-printable-decode filter in the affected PHP versions.
<?php
$data = "=?UTF-8?Q?a=Cexample_quoted_printable?= =?UTF-8?Q?_string-_?=c";
$decodedData = iconv_mime_decode($data, , "UTF-8");
echo "Decoded Data: " . $decodedData;
?>
In the affected versions, the above code could lead to a buffer overread by one byte, causing unpredictable behavior.
Exploit Details and Impact
The buffer overread in the convert.quoted-printable-decode filter can potentially lead to crashes or disclose content from other memory areas. An attacker might exploit this vulnerability to leak sensitive information from the application or cause a denial-of-service (DoS) condition by crashing the PHP process.
Although this vulnerability might not directly lead to code execution, it could potentially be combined with other vulnerabilities to achieve a more significant impact.
Mitigation and Recommendations
The PHP development team has released patches for the affected versions to address CVE-2024-11233. Users of PHP versions 8.1.* before 8.1.31, 8.2.* before 8.2.26, and 8.3.* before 8.3.14 should immediately update their PHP installation to a safe, patched version.
In addition to updating PHP, users should consider the following best practices for secure PHP development:
Conclusion
CVE-2024-11233 is an important security vulnerability affecting PHP's convert.quoted-printable-decode filter in PHP versions 8.1.* before 8.1.31, 8.2.* before 8.2.26, and 8.3.* before 8.3.14. Users of these PHP versions should update their installations as soon as possible to protect against crashes and information disclosure. Please refer to the official references for more information and always follow best practices for secure software development.
Timeline
Published on: 11/24/2024 02:15:16 UTC
Last modified on: 11/26/2024 18:26:37 UTC