Description
In the Linux kernel, the following vulnerability has been resolved: usb: usblp: fix uninitialized heap leak via LPGETSTATUS ioctl Just like in a previous problem in this driver, usblp_ctrl_msg() will collapse the usb_control_msg() return value to 0/-errno, discarding the actual number of bytes transferred. Ideally that short command should be detected and error out, but many printers are known to send "incorrect" responses back so we can't just do that. statusbuf is kmalloc(8) at probe time and never filled before the first LPGETSTATUS ioctl. usblp_read_status() requests 1 byte. If a malicious printer responds with zero bytes, *statusbuf is one byte of stale kmalloc heap, sign-extended into the local int status, which the LPGETSTATUS path then copy_to_user()s directly to the ioctl caller. Fix this all by just zapping out the memory buffer when allocated at probe time. If a later call does a short read, the data will be identical to what the device sent it the last time, so there is no "leak" of information happening.
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
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 0f7c41314ebf17049917a452684db371babf711aaffected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < cf24991619be317e2769310b4a367bf4a04b82bcaffected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 087d97342c100138ea7d75a50977c9c2319f957baffected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < d06d937b0a4cdb8867f04275c8100a8b943da31aaffected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < a502b997668401a6821501fc98b7f9220f9b6ff2affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 762a6ccf391db0d629e590a803a3a2231e17dd3faffected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 6b0e7438e31c74b01514d31ff35c1e688c4baabaaffected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < b38e53cbfb9d84732e5984fbd73e128d592415c5affected
Linux Linux
Default version status: affected
2.6.12affected0 to < 2.6.12unaffected5.10.258 to ≤ 5.10.*unaffected5.15.209 to ≤ 5.15.*unaffected6.1.175 to ≤ 6.1.*unaffected6.6.140 to ≤ 6.6.*unaffected6.12.88 to ≤ 6.12.*unaffected6.18.30 to ≤ 6.18.*unaffected7.0.7 to ≤ 7.0.*unaffected7.1 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/0f7c41314ebf17049917a452684db371babf711a ↗
- https://git.kernel.org/stable/c/cf24991619be317e2769310b4a367bf4a04b82bc ↗
- https://git.kernel.org/stable/c/087d97342c100138ea7d75a50977c9c2319f957b ↗
- https://git.kernel.org/stable/c/d06d937b0a4cdb8867f04275c8100a8b943da31a ↗
- https://git.kernel.org/stable/c/a502b997668401a6821501fc98b7f9220f9b6ff2 ↗
- https://git.kernel.org/stable/c/762a6ccf391db0d629e590a803a3a2231e17dd3f ↗
- https://git.kernel.org/stable/c/6b0e7438e31c74b01514d31ff35c1e688c4baaba ↗
- https://git.kernel.org/stable/c/b38e53cbfb9d84732e5984fbd73e128d592415c5 ↗
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html ↗