Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: dm-crypt: reject the lmk IV mode with AEAD ciphers A "capi:" table line that pairs an AEAD cipher with the lmk IV mode, for example "capi:gcm(aes)-lmk" with the integrity:28:aead option, causes an oops when it is loaded. lmk sets tfms_count to 64, but crypt_alloc_tfms_aead only allocates one transform, so crypt_setkey reads past the end of the tfms_aead array and calls crypto_aead_setkey on the values it finds there. lmk exists for compatibility with Loop-AES, which uses CBC, so refuse it with an AEAD cipher rather than allocate 64 AEAD transforms. The check cannot go in crypt_iv_lmk_ctr with the other lmk checks, because the IV constructor runs after crypt_set_key. Note that this is not a security bug because the memory corruption can only be triggered by root.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 33d2f09fcb357fd1861c4959d1d3505492bf91f8 before 9a0dab8a9d9975dec14a118b55cae2517aea5ca9; affected 33d2f09fcb357fd1861c4959d1d3505492bf91f8 before 962ce265fbf5d87afeb78cf19c12e083ab0ffeb8; affected 33d2f09fcb357fd1861c4959d1d3505492bf91f8 before a1a875614dae43b43d311bb9e7a7a70eed78efe6; affected 33d2f09fcb357fd1861c4959d1d3505492bf91f8 before 40ea7dfa8cd5f9aed72a55c9ca3008aee5880e6f; affected 33d2f09fcb357fd1861c4959d1d3505492bf91f8 before 3195e0daf590683992edb4eed32269e569e04924 |
| Linux / Linux | affected 4.12; unaffected 0 before 4.12; unaffected 6.6.160 through 6.6.*; unaffected 6.12.113 through 6.12.*; unaffected 6.18.57 through 6.18.*; unaffected 7.2.11 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/9a0dab8a9d9975dec14a118b55cae2517aea5ca9
- https://git.kernel.org/stable/c/962ce265fbf5d87afeb78cf19c12e083ab0ffeb8
- https://git.kernel.org/stable/c/a1a875614dae43b43d311bb9e7a7a70eed78efe6
- https://git.kernel.org/stable/c/40ea7dfa8cd5f9aed72a55c9ca3008aee5880e6f
- https://git.kernel.org/stable/c/3195e0daf590683992edb4eed32269e569e04924