Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: s390/zcrypt: Fix missing mem scrub at clear key import in cca_clr2cipherkey() The helper function _ip_cprb_helper() uses internal buffer memory for building and processing CPRBs. After use this buffer was never scrubbed which could lead to leaving for example clear key material in memory which could be exposed via tricky reuse of this same memory. Extend the _ip_cprb_helper() function with another parameter 'scrub' used to steer scrubbing of this buffer. So now the caller has the opportunity to decide if scrubbing is needed or not. Extend the clear key to secure key token import process in function cca_clr2cipherkey() to tell the helper function from above to scrub the cprb buffer when the clear key value is part of the request data. Add explicit scrubbing on return from function cca_clr2cipherkey() for the random EXOR buffer and the cprb buffer. Overall this cleans the internal used buffer in case of clear key import to prevent sensitive data to get exposed.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd before 8e1c0def77b7450be0ed607ed0d7bae629d30020; affected 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd before be7ae07fb745d1cf575b03a178a055b0a2859364; affected 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd before 4e26d0d72bfdec311f12acfa0c6b7fbeb6a343d3; affected 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd before 7dd6e556dbfc91d3d511cfd1015d2dad42608010; affected 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd before b453003ae6a869f5bdf025b5519cbb38295ae4f1; affected 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd before fbb0410986e8ad214121e51a4a28c3d0a10b7644; affected 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd before ebfbb9ac7adbb1e3556100b54a27e8a9b102feac; affected 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd before 01476391aecef36a3b789ee844357b22fbc90665 |
| Linux / Linux | affected 5.4; unaffected 0 before 5.4; unaffected 5.10.265 through 5.10.*; unaffected 5.15.216 through 5.15.*; unaffected 6.1.183 through 6.1.*; unaffected 6.6.152 through 6.6.*; unaffected 6.12.104 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/8e1c0def77b7450be0ed607ed0d7bae629d30020
- https://git.kernel.org/stable/c/be7ae07fb745d1cf575b03a178a055b0a2859364
- https://git.kernel.org/stable/c/4e26d0d72bfdec311f12acfa0c6b7fbeb6a343d3
- https://git.kernel.org/stable/c/7dd6e556dbfc91d3d511cfd1015d2dad42608010
- https://git.kernel.org/stable/c/b453003ae6a869f5bdf025b5519cbb38295ae4f1
- https://git.kernel.org/stable/c/fbb0410986e8ad214121e51a4a28c3d0a10b7644
- https://git.kernel.org/stable/c/ebfbb9ac7adbb1e3556100b54a27e8a9b102feac
- https://git.kernel.org/stable/c/01476391aecef36a3b789ee844357b22fbc90665