CVE-2024-36016

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxe1eaea46bb4020b38a141b84f88565d4603f8dd0 < 9513d4148950b05bc99fa7314dc883cc0e1605e5affected
LinuxLinuxe1eaea46bb4020b38a141b84f88565d4603f8dd0 < b229bc6c6ea9fe459fc3fa94fd0a27a2f32aca56affected
LinuxLinuxe1eaea46bb4020b38a141b84f88565d4603f8dd0 < 0fb736c9931e02dbc7d9a75044c8e1c039e50f04affected
LinuxLinuxe1eaea46bb4020b38a141b84f88565d4603f8dd0 < 4c267110fc110390704cc065edb9817fdd10ff54affected
LinuxLinuxe1eaea46bb4020b38a141b84f88565d4603f8dd0 < 46f52c89a7e7d2691b97a9728e4591d071ca8abcaffected
LinuxLinuxe1eaea46bb4020b38a141b84f88565d4603f8dd0 < 774d83b008eccb1c48c14dc5486e7aa255731350affected
LinuxLinuxe1eaea46bb4020b38a141b84f88565d4603f8dd0 < f126ce7305fe88f49cdabc6db4168b9318898ea3affected
LinuxLinuxe1eaea46bb4020b38a141b84f88565d4603f8dd0 < b890d45aaf02b564e6cae2d2a590f9649330857daffected
LinuxLinuxe1eaea46bb4020b38a141b84f88565d4603f8dd0 < 47388e807f85948eefc403a8a5fdc5b406a65d5aaffected
LinuxLinux2.6.35affected
LinuxLinux0 < 2.6.35unaffected
LinuxLinux4.19.316 <= 4.19.*unaffected
LinuxLinux5.4.278 <= 5.4.*unaffected
LinuxLinux5.10.219 <= 5.10.*unaffected
LinuxLinux5.15.161 <= 5.15.*unaffected
LinuxLinux6.1.93 <= 6.1.*unaffected
LinuxLinux6.6.33 <= 6.6.*unaffected
LinuxLinux6.8.12 <= 6.8.*unaffected
LinuxLinux6.9.3 <= 6.9.*unaffected
LinuxLinux6.10 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

CVE Program Container

Additional References

References