Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: s390/zcrypt: Fix buffer over-read in cca_cipher2protkey Add validation of both the actual key buffer size and token length fields in all the cca_check_sec*token() functions. Additionally check in cca_gencipherkey() for possible underflow with returned key size. The CCA token structures contain user-controlled len fields that were used in operations without proper validation against both the actual buffer size and minimum token structure size. An attacker could set this field larger than the actual buffer size, leading to reading beyond buffer boundaries. This may result in a kernel crash or exposure of memory via sending this as part of a request down to the crypto card. Also an attacker could have used a very small len value and thus enforce a buffer under-run which may produce similar effects as a over-read. So now a key must - key buf length must be at least sizeof the token struct - the key len field inside the token must fit into the range of sizeof key token struct ... key buf length
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd before d0951ed366710a1a303b7cb2f8eb3d866cd68fc6; affected 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd before 353e442d18084b24fb3ede4e5adfca26b25f0e89; affected 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd before a57fd7fcdb63e2d5ceac78bbe825ec986062a9da; affected 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd before 3b2abee2a678607ae27975bc6833785c2002df43; affected 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd before 36b230835b8a008266aad22168ca52afacc8a58d |
| Linux / Linux | affected 5.4; unaffected 0 before 5.4; unaffected 6.6.160 through 6.6.*; unaffected 6.12.114 through 6.12.*; unaffected 6.18.44 through 6.18.*; unaffected 7.1.8 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/d0951ed366710a1a303b7cb2f8eb3d866cd68fc6
- https://git.kernel.org/stable/c/353e442d18084b24fb3ede4e5adfca26b25f0e89
- https://git.kernel.org/stable/c/a57fd7fcdb63e2d5ceac78bbe825ec986062a9da
- https://git.kernel.org/stable/c/3b2abee2a678607ae27975bc6833785c2002df43
- https://git.kernel.org/stable/c/36b230835b8a008266aad22168ca52afacc8a58d
ADP enrichment
No English description supplied.
No references supplied.