Vulnerability in sshock AFFLIB

[ Description ]Official description

AFFLIB through 3.7.22 contains a heap out-of-bounds write vulnerability in af_get_page() that allows attackers to corrupt heap memory by supplying crafted AFF images with mismatched page and sector sizes. Attackers can set a page size larger than and not a multiple of the sector size, causing the sector zero-fill loop to write past the buffer and crash forensic tools.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References

• github.com/sshock/AFFLIBv3
• github.com/sshock/AFFLIBv3/blob/v3.7.22/lib/afflib_pages.cpp
• github.com/sshock/AFFLIBv3/issues/61
• hackmd.io/@haindpwn/afflib-aff-get-page-sector-fill-oob-write
• www.vulncheck.com/advisories/afflib-through-3.7.22-heap-out-of-bounds-write-in-af-get-page