CVE-2010-1866
CRITICALPHP 5.3.0-5.3.2 - Denial of Service via Negative Chunk Size in HTTP Chunked Encoding Decoder
Title source: llmExploitation Summary
EIP tracks 1 public exploit for CVE-2010-1866. PoCs published by Stefan Esser.
AI-analyzed exploit summary This exploit leverages an integer overflow vulnerability in PHP's file handling functions to trigger a denial-of-service or potentially execute arbitrary code. The PoC writes a malformed chunk to a file and reads it back using a dechunk filter, causing the overflow.
Description
The dechunk filter in PHP 5.3 through 5.3.2, when decoding an HTTP chunked encoding stream, allows context-dependent attackers to cause a denial of service (crash) and possibly trigger memory corruption via a negative chunk size, which bypasses a signed comparison, related to an integer overflow in the chunk size decoder.
Exploits (1)
This exploit leverages an integer overflow vulnerability in PHP's file handling functions to trigger a denial-of-service or potentially execute arbitrary code. The PoC writes a malformed chunk to a file and reads it back using a dechunk filter, causing the overflow.
References (2)
Scores
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H