Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: handle empty FILS association request payload fils_encrypt_assoc_req() accepts a (Re)Association Request frame whose last element is the FILS Session element. crypt_len is then zero and aes_siv_encrypt() is called with an empty plaintext. kmemdup() returns ZERO_SIZE_PTR for a zero-length allocation, so the unconditional sg_init_one() puts an invalid page into the scatterlist. With CONFIG_DEBUG_SG this triggers a kernel BUG in sg_set_buf(); without the debug check the bogus page is handed to the crypto backend. AES-SIV is defined for empty plaintext and the S2V result is then the complete output, so handle this case before the CTR step, which has nothing to encrypt.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 39404feee691a2dc524a629ed6eb5cfe5d8898d1 before 0b1e4a7eeb6a301ee33bd318982927cbdbae9f36; affected 39404feee691a2dc524a629ed6eb5cfe5d8898d1 before 2f5b62f6534d336a62fdb9e88b186dd70b4323ef; affected 39404feee691a2dc524a629ed6eb5cfe5d8898d1 before 452f1c9b76f7a122bbc4630b9691bda4809677c4; affected 39404feee691a2dc524a629ed6eb5cfe5d8898d1 before 20f939b0c151d1d28e6b62a76b2454fa6fe877f2; affected 39404feee691a2dc524a629ed6eb5cfe5d8898d1 before 5bfd4b0b40b79781d900cb2f7da0685070f53c67 |
| Linux / Linux | affected 4.10; unaffected 0 before 4.10; unaffected 6.6.160 through 6.6.*; unaffected 6.12.113 through 6.12.*; unaffected 6.18.56 through 6.18.*; unaffected 7.2.10 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/0b1e4a7eeb6a301ee33bd318982927cbdbae9f36
- https://git.kernel.org/stable/c/2f5b62f6534d336a62fdb9e88b186dd70b4323ef
- https://git.kernel.org/stable/c/452f1c9b76f7a122bbc4630b9691bda4809677c4
- https://git.kernel.org/stable/c/20f939b0c151d1d28e6b62a76b2454fa6fe877f2
- https://git.kernel.org/stable/c/5bfd4b0b40b79781d900cb2f7da0685070f53c67