Vulnerability Instance

This combination of an Arbitrary File Read (CVE-2024-34102) and a Buffer Overflow in glibc (CVE-2024-2961)
          allows for unauthenticated Remote Code Execution on the following versions of Magento and Adobe Commerce and
          earlier if the PHP and glibc versions are also vulnerable:
          - 2.4.7 and earlier
          - 2.4.6-p5 and earlier
          - 2.4.5-p7 and earlier
          - 2.4.4-p8 and earlier

          Vulnerable PHP versions:
          - From PHP 7.0.0 (2015) to 8.3.7 (2024)

          Vulnerable iconv() function in the GNU C Library:
          - 2.39 and earlier

          The exploit chain is quite interesting and for more detailed information check out the references. The tl;dr being:
          CVE-2024-34102 is an XML External Entity vulnerability leveraging  PHP filters to read arbitrary files from the target
          system. The exploit chain uses this to read /proc/self/maps, providing the address of PHP's heap and the libc's filename.
          The libc is then downloaded, and the offsets of libc_malloc, libc_system and libc_realloc are extracted, and made use
          of later in the chain.

          With this information and expert knowledge of PHP's heap (chunks, free lists, buckets, bucket brigades), CVE-2024-2961
          can be exploited. A long chain of PHP filters is constructed and sent in the same way the XXE is exploited, building a
          payload in memory and using the buffer overflow to execute it, resulting in an unauthenticated RCE.

Stability:
  - crash-safe
SideEffects:
  - artifacts-on-disk
  - ioc-in-logs
Reliability:
  - repeatable-session