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18 lines
1.4 KiB
Markdown
18 lines
1.4 KiB
Markdown
### [CVE-2024-36016](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-36016)
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### Description
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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 lessthan. Also add upper limit checks against the constant MAX_MRU ingsm0_receive() and gsm1_receive() to harden against memory corruption ofgsm->len and gsm->mru.All other checks remain as we still need to limit the data according to theuser configuration and actual payload size.
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### POC
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#### Reference
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No PoCs from references.
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#### Github
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- https://github.com/xairy/linux-kernel-exploitation
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