[OpenSIPS-Devel] [OpenSIPS/opensips] 0b4f4a: parse_content_length(): Fix out-of-bounds read edg...

[Liviu Chircu]

  Branch: refs/heads/3.1
  Home:   https://github.com/OpenSIPS/opensips
  Commit: 0b4f4a5ba2faa76e63ef7ea9b2ca42564f4f0444
      https://github.com/OpenSIPS/opensips/commit/0b4f4a5ba2faa76e63ef7ea9b2ca42564f4f0444
  Author: Liviu Chircu <liviu at opensips.org>
  Date:   2023-02-07 (Tue, 07 Feb 2023)

  Changed paths:
    M parser/parse_content.c
    M parser/test/test_parser.c

  Log Message:
  -----------
  parse_content_length(): Fix out-of-bounds read edge-case (OSS-Fuzz)

This patch fixes a possible off-by-one read overflow while parsing a bad
Content-Length header.  The error was mostly harmless, as the supplied
buffer is typically much larger and is stored in PKG memory.

Severity: Low
Fixes OSS-Fuzz#53199

(cherry picked from commit a008e7c2385bcd83de2f9ab155ed8a9452bf3c5c)