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CVE-2024-36016 Affecting kernel-64k-debug-devel-matched package, versions <0:5.14.0-427.37.1.el9_4

Severity

 Recommended
high

Based on AlmaLinux security rating

    Threat Intelligence

    EPSS
    0.04% (15th percentile)

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  • Snyk ID SNYK-ALMALINUX9-KERNEL64KDEBUGDEVELMATCHED-8325227
  • published 4 Nov 2024
  • disclosed 24 Sep 2024
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Introduced: 24 Sep 2024

CVE-2024-36016 Open this link in a new tab

How to fix?

Upgrade AlmaLinux:9 kernel-64k-debug-devel-matched to version 0:5.14.0-427.37.1.el9_4 or higher.
This issue was patched in ALSA-2024:6997.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-64k-debug-devel-matched package and not the kernel-64k-debug-devel-matched package as distributed by AlmaLinux. See How to fix? for AlmaLinux:9 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

CVSS Scores

version 3.1
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Red Hat

6.4 medium
  • Attack Vector (AV)
    Adjacent
  • Attack Complexity (AC)
    High
  • Privileges Required (PR)
    High
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    High
  • Integrity (I)
    High
  • Availability (A)
    High
Expand this section

SUSE

6.7 medium