A denial of service vulnerability exists in curl <v8.1.0 in the way libcurl provides several different backends for resolving host names, selected at build time. If it is built to use the synchronous resolver, it allows name resolves to time-out slow operations using `alarm()` and `siglongjmp()`. When doing this, libcurl used a global buffer that was not mutex protected and a multi-threaded application might therefore crash or otherwise misbehave.
The product does not properly control the allocation and maintenance of a limited resource.
The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.
| Link | Tags |
|---|---|
| https://hackerone.com/reports/1929597 | patch third party advisory exploit |
| https://security.netapp.com/advisory/ntap-20230609-0009/ | third party advisory |
| https://support.apple.com/kb/HT213843 | third party advisory |
| https://support.apple.com/kb/HT213844 | third party advisory |
| https://support.apple.com/kb/HT213845 | third party advisory |
| http://seclists.org/fulldisclosure/2023/Jul/52 | third party advisory mailing list |
| http://seclists.org/fulldisclosure/2023/Jul/48 | third party advisory mailing list |
| http://seclists.org/fulldisclosure/2023/Jul/47 | third party advisory mailing list |
| https://security.gentoo.org/glsa/202310-12 | third party advisory vendor advisory |