Description (CNA)
dsp_mmap_single() validated the requested mapping by checking the sum of the user-supplied offset and length against the buffer size. This addition could overflow, so that a large offset and length wrapped around and passed the check. The offset was then narrowed from 64 to 32 bits when converted to a buffer address, yielding a mapping that extended past the audio buffer into unrelated kernel memory. The /dev/dsp device nodes are world-accessible by default. On a system with an audio device, either issue allows an unprivileged local user to read and write kernel memory, which can be used to escalate privileges, potentially gaining full control of the affected system. At a minimum, an attacker can crash the kernel, resulting in a Denial of Service (DoS).
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| FreeBSD / FreeBSD | affected 15.0-RELEASE before p10; affected 14.4-RELEASE before p6; affected 14.3-RELEASE before p15 |
CWE
CWE-125, CWE-190, CWE-681, CWE-787
References
ADP enrichment
No English description supplied.
No references supplied.