CVE-2024-36016: tty: n_gsm: fix possible out-of-bounds in gsm0_receive()
First published: Wed May 29 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: tty: n_gsm: fix possible out-of-bounds in gsm0_receive() Assuming the following: - side A configures the n_gsm in basic option mode - side B sends the header of a basic option mode frame with data length 1 - side A switches to advanced option mode - side B sends 2 data bytes which exceeds gsm->len Reason: gsm->len is not used in advanced option mode. - side A switches to basic option mode - side B keeps sending until gsm0_receive() writes past gsm->buf Reason: Neither gsm->state nor gsm->len have been reset after reconfiguration. Fix this by changing gsm->count to gsm->len comparison from equal to less than. Also add upper limit checks against the constant MAX_MRU in gsm0_receive() and gsm1_receive() to harden against memory corruption of gsm->len and gsm->mru. All other checks remain as we still need to limit the data according to the user configuration and actual payload size.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <6.10 | 6.10 |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.119-1 6.12.5-1 6.12.6-1 |
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Reference Links
- https://git.kernel.org/stable/c/0fb736c9931e02dbc7d9a75044c8e1c039e50f04
- https://git.kernel.org/stable/c/46f52c89a7e7d2691b97a9728e4591d071ca8abc
- https://git.kernel.org/stable/c/47388e807f85948eefc403a8a5fdc5b406a65d5a
- https://git.kernel.org/stable/c/4c267110fc110390704cc065edb9817fdd10ff54
- https://git.kernel.org/stable/c/774d83b008eccb1c48c14dc5486e7aa255731350
- https://git.kernel.org/stable/c/9513d4148950b05bc99fa7314dc883cc0e1605e5
- https://git.kernel.org/stable/c/b229bc6c6ea9fe459fc3fa94fd0a27a2f32aca56
- https://git.kernel.org/stable/c/b890d45aaf02b564e6cae2d2a590f9649330857d
- https://git.kernel.org/stable/c/f126ce7305fe88f49cdabc6db4168b9318898ea3
- https://launchpad.net/bugs/cve/CVE-2024-36016
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-36016
- https://nvd.nist.gov/vuln/detail/CVE-2024-36016
- https://security-tracker.debian.org/tracker/CVE-2024-36016
- https://ubuntu.com/security/CVE-2024-36016
- https://git.kernel.org/linus/47388e807f85948eefc403a8a5fdc5b406a65d5a
- https://access.redhat.com/security/cve/CVE-2024-36016
- https://lore.kernel.org/linux-cve-announce/2024052947-CVE-2024-36016-d30a@gregkh/T
- https://access.redhat.com/errata/RHSA-2024:4533
- https://access.redhat.com/errata/RHSA-2024:4554
- https://access.redhat.com/errata/RHSA-2024:5102
- https://access.redhat.com/errata/RHSA-2024:5101
- https://access.redhat.com/errata/RHSA-2024:5692
- https://access.redhat.com/errata/RHSA-2024:6993
- https://access.redhat.com/errata/RHSA-2024:6997
- https://bugzilla.redhat.com/show_bug.cgi?id=2283894
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