Description (CNA)
c-ares is an asynchronous resolver library. From ver 1.32.3 until 1.34.7, a use-after-free / double-free in c-ares' query-completion handling. The same flaw — a query's callback being invoked while the query is still linked in the channel's internal lookup structures — is present at multiple points in the resend/finish path (timeout handling, response handling, and query dispatch). If the query, or for ares_getaddrinfo() the owning host_query, is freed as a side effect of that callback, it is then accessed and/or freed a second time. This vulnerability is fixed in ver 1.34.7.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| c-ares / c-ares | affected >= 1.32.3, < 1.34.7 |
CWE
CWE-415, CWE-416
References
- https://github.com/c-ares/c-ares/security/advisories/GHSA-6wfj-rwm7-3542
- https://github.com/c-ares/c-ares/pull/1237
- https://github.com/c-ares/c-ares/commit/1fa3b86a0b8d18fe7b60f3228a01d770feb026bc
- https://github.com/c-ares/c-ares/commit/d823199b688052dcdc1646f2ab4cb8c16b1c644a
- https://github.com/c-ares/c-ares/releases/tag/v1.34.7
ADP enrichment
No English description supplied.
No references supplied.