Description
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 products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd to < 8e1c0def77b7450be0ed607ed0d7bae629d30020affected4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd to < be7ae07fb745d1cf575b03a178a055b0a2859364affected4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd to < 4e26d0d72bfdec311f12acfa0c6b7fbeb6a343d3affected4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd to < 7dd6e556dbfc91d3d511cfd1015d2dad42608010affected4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd to < b453003ae6a869f5bdf025b5519cbb38295ae4f1affected4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd to < fbb0410986e8ad214121e51a4a28c3d0a10b7644affected4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd to < ebfbb9ac7adbb1e3556100b54a27e8a9b102feacaffected4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd to < 01476391aecef36a3b789ee844357b22fbc90665affected
Linux Linux
Default version status: affected
5.4affected0 to < 5.4unaffected5.10.265 to ≤ 5.10.*unaffected5.15.216 to ≤ 5.15.*unaffected6.1.183 to ≤ 6.1.*unaffected6.6.152 to ≤ 6.6.*unaffected6.12.104 to ≤ 6.12.*unaffected6.18.44 to ≤ 6.18.*unaffected7.1.8 to ≤ 7.1.*unaffected7.2 to ≤ *unaffected
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 ↗