cve-2023-52767
Vulnerability from cvelistv5
Published
2024-05-21 15:30
Modified
2024-12-19 08:25
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: tls: fix NULL deref on tls_sw_splice_eof() with empty record syzkaller discovered that if tls_sw_splice_eof() is executed as part of sendfile() when the plaintext/ciphertext sk_msg are empty, the send path gets confused because the empty ciphertext buffer does not have enough space for the encryption overhead. This causes tls_push_record() to go on the `split = true` path (which is only supposed to be used when interacting with an attached BPF program), and then get further confused and hit the tls_merge_open_record() path, which then assumes that there must be at least one populated buffer element, leading to a NULL deref. It is possible to have empty plaintext/ciphertext buffers if we previously bailed from tls_sw_sendmsg_locked() via the tls_trim_both_msgs() path. tls_sw_push_pending_record() already handles this case correctly; let's do the same check in tls_sw_splice_eof().
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2214e2bb5489145aba944874d0ee1652a0a63dc8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/53f2cb491b500897a619ff6abd72f565933760f0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/944900fe2736c07288efe2d9394db4d3ca23f2c9
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/2214e2bb5489145aba944874d0ee1652a0a63dc8
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/53f2cb491b500897a619ff6abd72f565933760f0
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/944900fe2736c07288efe2d9394db4d3ca23f2c9
Impacted products
Vendor Product Version
Linux Linux Version: 6.5
Show details on NVD website

To clipboard 

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