[OpenSIPS-Devel] [OpenSIPS/opensips] a0824c: parse_content_length(): Fix out-of-bounds read edg...

[Liviu Chircu]

  Branch: refs/heads/3.1
  Home:   https://github.com/OpenSIPS/opensips
  Commit: a0824c2784b8343d22ccb2de35206f9ecebfe998
      https://github.com/OpenSIPS/opensips/commit/a0824c2784b8343d22ccb2de35206f9ecebfe998
  Author: Liviu Chircu <liviu at opensips.org>
  Date:   2023-02-08 (Wed, 08 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 several off-by-one read overflows while parsing a bad
Content-Length header.  Similar to a008e7c23, the error was mostly
harmless, as the supplied buffer is typically much larger in the runtime
usage of parse_msg().

Severity: Low
Fixes OSS-Fuzz#53397

(cherry picked from commit e060fe93429b6da665a4d4210a49876b43223a17)