Out-of-bounds Write Affecting kernel-debug-core package, versions <0:4.18.0-477.74.1.el8_8
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Test your applications- Snyk ID SNYK-RHEL8-KERNELDEBUGCORE-8086474
- published 24 Sep 2024
- disclosed 29 May 2024
Introduced: 29 May 2024
CVE-2024-36016 Open this link in a new tabHow to fix?
Upgrade RHEL:8 kernel-debug-core to version 0:4.18.0-477.74.1.el8_8 or higher.
This issue was patched in RHSA-2024:6993.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-debug-core package and not the kernel-debug-core package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
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.
References
- https://access.redhat.com/security/cve/CVE-2024-36016
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
- 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