curl: A denial of service vulnerability exists in curl <v8.1.0 in the way libcurl provides several different backends for r...
CVE-2023-28320 is fixed in curl on 1 platform, first by DEBIAN-CVE-2023-28320, released May 26, 2023. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| curl · Debian 12.15 (bookworm) | 7.88.1-10 | DEBIAN-CVE-2023-28320 | May 26, 2023 |
| curl · Debian 13.5 (trixie) | 7.88.1-10 | DEBIAN-CVE-2023-28320 | May 26, 2023 |
| curl · Debian 14 | 7.88.1-10 | DEBIAN-CVE-2023-28320 | May 26, 2023 |
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