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
Configurations
Configuration 1 (hide)
|
History
06 Jan 2025, 20:29
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.7:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.7:rc2:*:*:*:*:*:* |
|
| First Time |
Linux linux Kernel
Linux |
|
| CWE | CWE-476 | |
| References | () https://git.kernel.org/stable/c/2214e2bb5489145aba944874d0ee1652a0a63dc8 - Patch | |
| References | () https://git.kernel.org/stable/c/53f2cb491b500897a619ff6abd72f565933760f0 - Patch | |
| References | () https://git.kernel.org/stable/c/944900fe2736c07288efe2d9394db4d3ca23f2c9 - Patch |
Information
Published : 2024-05-21 16:15
Updated : 2025-01-06 20:29
NVD link : CVE-2023-52767
Mitre link : CVE-2023-52767
CVE.ORG link : CVE-2023-52767
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-476
NULL Pointer Dereference