Google Inc. AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

S-Unclear if Scope change occurs

UI-Internet browsing

Google Inc. CWE-20

CWE-20 / More specific CWE option available

With a specially crafted WebP lossless file, libwebp may write data out of bounds to the heap.

The ReadHuffmanCodes() function allocates the HuffmanCode buffer with a size that comes from an array of precomputed sizes: kTableSize. The color_cache_bits value defines which size to use.

The kTableSize array only takes into account sizes for 8-bit first-level table lookups but not second-level table lookups. libwebp allows codes that are up to 15-bit (MAX_ALLOWED_CODE_LENGTH). When BuildHuffmanTable() attempts to fill the second-level tables it may write data out-of-bounds. The OOB write to the undersized array happens in ReplicateValue.

** REJECT ** This CVE ID has been rejected or withdrawn by its CVE Numbering Authority. Duplicate of CVE-2023-4863.

http://www.openwall.com/lists/oss-security/2023/09/26/1 [No Types Assigned]

https://chromium.googlesource.com/webm/libwebp/+/2af26267cdfcb63a88e5c74a85927a12d6ca1d76 [Patch]

https://chromium.googlesource.com/webm/libwebp/+/902bc9190331343b2017211debcec8d2ab87e17a [Patch]