Description
In the Linux kernel, the following vulnerability has been resolved: crypto: atmel-sha204a - fix blocking and non-blocking rng logic The blocking and non-blocking paths were failing to provide valid entropy due to improper buffer management. Reading the buffer starting from byte 1, only fetch the 32 bytes of random data from the return message. Tested on an Atmel SHA204A device. Before (here for blocking), tests showed repeatedly reading reduced bytes. $ head -c 32 /dev/hwrng | hexdump -C 00000000 02 28 85 b3 47 40 f2 ee 00 00 00 00 00 00 00 00 |.(..G@..........| 00000010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 00000020 After, the result will be similar to the following: $ head -c 32 /dev/hwrng | hexdump -C 00000000 5a fc 3f 13 14 68 fe 06 68 0a bd 04 83 6e 09 69 |Z.?..h..h....n.i| 00000010 75 ff cf 87 10 84 3b c9 c1 df ae eb 45 53 4c c3 |u.....;.....ESL.| 00000020
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
da001fb651b00e1deeaf24767dd691ae8152a4f5 to < 76269a91fd9560c5f03c3e59421a0329e39a6661affectedda001fb651b00e1deeaf24767dd691ae8152a4f5 to < 9039bb4f238474379221fc933c34f19f0cba501baffectedda001fb651b00e1deeaf24767dd691ae8152a4f5 to < d4aa6141ff03ec82eed6fcef814300fb855ce5d8affectedda001fb651b00e1deeaf24767dd691ae8152a4f5 to < e833e865e4944ba75120db534bd931db6cf677d3affectedda001fb651b00e1deeaf24767dd691ae8152a4f5 to < 2fa302bbc62dec7cb6339c9494e0e3f2f884afebaffectedda001fb651b00e1deeaf24767dd691ae8152a4f5 to < aac63bbea8fd5a34f1a4305cb73369068f952d32affectedda001fb651b00e1deeaf24767dd691ae8152a4f5 to < 938ae1fb4a8f5db43b62b6206d409efbf317f0d9affectedda001fb651b00e1deeaf24767dd691ae8152a4f5 to < 319400fc5ee15db5793aa45f854968141326effcaffected
Linux Linux
Default version status: affected
5.3affected0 to < 5.3unaffected5.10.261 to ≤ 5.10.*unaffected5.15.212 to ≤ 5.15.*unaffected6.1.178 to ≤ 6.1.*unaffected6.6.145 to ≤ 6.6.*unaffected6.12.97 to ≤ 6.12.*unaffected6.18.40 to ≤ 6.18.*unaffected7.1.5 to ≤ 7.1.*unaffected7.2 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/76269a91fd9560c5f03c3e59421a0329e39a6661 ↗
- https://git.kernel.org/stable/c/9039bb4f238474379221fc933c34f19f0cba501b ↗
- https://git.kernel.org/stable/c/d4aa6141ff03ec82eed6fcef814300fb855ce5d8 ↗
- https://git.kernel.org/stable/c/e833e865e4944ba75120db534bd931db6cf677d3 ↗
- https://git.kernel.org/stable/c/2fa302bbc62dec7cb6339c9494e0e3f2f884afeb ↗
- https://git.kernel.org/stable/c/aac63bbea8fd5a34f1a4305cb73369068f952d32 ↗
- https://git.kernel.org/stable/c/938ae1fb4a8f5db43b62b6206d409efbf317f0d9 ↗
- https://git.kernel.org/stable/c/319400fc5ee15db5793aa45f854968141326effc ↗