Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: crypto: qce - fix CCM AAD buffer underallocation The AAD buffer allocated in qce_aead_ccm_prepare_buf_assoclen() can be smaller than the length later programmed into the DMA scatterlist. The allocation size is currently calculated as: ALIGN(assoclen, 16) + MAX_CCM_ADATA_HEADER_LEN while the DMA length is set to: ALIGN(assoclen + adata_header_len, 16) Since ALIGN() does not distribute over addition, the allocation can be smaller than the DMA length. For example, when assoclen = 32 and adata_header_len = 2: allocation = ALIGN(32, 16) + 6 = 38 DMA length = ALIGN(32 + 2, 16) = 48 As a result, the QCE hardware can read beyond the allocated buffer while computing the CBC-MAC over the associated data. The extra bytes are folded into the authentication tag, resulting in an incorrect tag and causing CCM self-test failures such as: alg: aead: ccm-aes-qce encryption test failed (wrong result) on test vector 8 Fix the allocation by adding the maximum possible AAD header length before alignment: ALIGN(assoclen + MAX_CCM_ADATA_HEADER_LEN, 16) This guarantees that the allocated buffer is large enough for the fully padded AAD data for all supported header sizes.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 9363efb4181c5e0fbf86bdfa759262aa29f0eb50 before 11775b35ce9f27e73d62188d7d38aa0dc0a219aa; affected 9363efb4181c5e0fbf86bdfa759262aa29f0eb50 before c9e0f06a023107694698a7930616aeb460d91816; affected 9363efb4181c5e0fbf86bdfa759262aa29f0eb50 before cc56d2b0d77cfeea061e98114992ee687d5eb4dd; affected 9363efb4181c5e0fbf86bdfa759262aa29f0eb50 before 002f1f99aef7ea631cb687fc17bce64e4963f6aa; affected 9363efb4181c5e0fbf86bdfa759262aa29f0eb50 before 2f65718b9c1095eef1ae9b374aa0384b1b083f3c; affected 9363efb4181c5e0fbf86bdfa759262aa29f0eb50 before 46a84efe2dbaddde89073a3c00c694486937c34b; affected 9363efb4181c5e0fbf86bdfa759262aa29f0eb50 before 4839f4c21f9c577eedef2919ced878a3057c7fc3; affected 9363efb4181c5e0fbf86bdfa759262aa29f0eb50 before 7f2345f47dd189625f657cd72437179ab4170ee1 |
| Linux / Linux | affected 5.14; unaffected 0 before 5.14; unaffected 5.15.220 through 5.15.*; unaffected 6.1.187 through 6.1.*; unaffected 6.6.156 through 6.6.*; unaffected 6.12.108 through 6.12.*; unaffected 6.18.49 through 6.18.*; unaffected 7.1.13 through 7.1.*; unaffected 7.2.3 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/11775b35ce9f27e73d62188d7d38aa0dc0a219aa
- https://git.kernel.org/stable/c/c9e0f06a023107694698a7930616aeb460d91816
- https://git.kernel.org/stable/c/cc56d2b0d77cfeea061e98114992ee687d5eb4dd
- https://git.kernel.org/stable/c/002f1f99aef7ea631cb687fc17bce64e4963f6aa
- https://git.kernel.org/stable/c/2f65718b9c1095eef1ae9b374aa0384b1b083f3c
- https://git.kernel.org/stable/c/46a84efe2dbaddde89073a3c00c694486937c34b
- https://git.kernel.org/stable/c/4839f4c21f9c577eedef2919ced878a3057c7fc3
- https://git.kernel.org/stable/c/7f2345f47dd189625f657cd72437179ab4170ee1