CVE-2023-53516
N/A
Summary
In the Linux kernel, the following vulnerability has been resolved:
macvlan: add forgotten nla_policy for IFLA_MACVLAN_BC_CUTOFF
The previous commit 954d1fa1ac93 ("macvlan: Add netlink attribute for broadcast cutoff") added one additional attribute named IFLA_MACVLAN_BC_CUTOFF to allow broadcast cutfoff.
However, it forgot to describe the nla_policy at macvlan_policy (drivers/net/macvlan.c). Hence, this suppose NLA_S32 (4 bytes) integer can be faked as empty (0 bytes) by a malicious user, which could leads to OOB in heap just like CVE-2023-3773.
To fix it, this commit just completes the nla_policy description for IFLA_MACVLAN_BC_CUTOFF. This enforces the length check and avoids the potential OOB read.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 954d1fa1ac93aa8a66f7d9a9ba545cf7f020d348 < 79f44709aa7a744fbfbadd4aef678443290c6991 | affected |
| Linux | Linux | 954d1fa1ac93aa8a66f7d9a9ba545cf7f020d348 < 55cef78c244d0d076f5a75a35530ca63c92f4426 | affected |
| Linux | Linux | 6.4 | affected |
| Linux | Linux | 0 < 6.4 | unaffected |
| Linux | Linux | 6.4.8 <= 6.4.* | unaffected |
| Linux | Linux | 6.5 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/79f44709aa7a744fbfbadd4aef678443290c6991
- https://git.kernel.org/stable/c/55cef78c244d0d076f5a75a35530ca63c92f4426
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