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CVE-2023-28320
A denial of service vulnerability exists in curl <v8.1.0 in the way libcurl provides several different backends for resolving host names,…
Medium5.9EPSS 2.7%
- Published
- Updated
- Reserved
- Assigned by
- hackerone
Description
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Medium5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | Medium5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 2.7% · top 14% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: no · Technical impact: partial
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.9.
Weakness
Affected products
https://github.com/curl/curl
- affected Fixed in 8.1.0
References (9)
- https://hackerone.com/reports/1929597 (opens in a new tab)x_transferred
- https://security.netapp.com/advisory/ntap-20230609-0009/ (opens in a new tab)x_transferred
- https://support.apple.com/kb/HT213843 (opens in a new tab)x_transferred
- https://support.apple.com/kb/HT213844 (opens in a new tab)x_transferred
- https://support.apple.com/kb/HT213845 (opens in a new tab)x_transferred
- 20230725 APPLE-SA-2023-07-24-6 macOS Big Sur 11.7.9 (opens in a new tab)mailing-listx_transferred
- 20230725 APPLE-SA-2023-07-24-5 macOS Monterey 12.6.8 (opens in a new tab)mailing-listx_transferred
- 20230725 APPLE-SA-2023-07-24-4 macOS Ventura 13.5 (opens in a new tab)mailing-listx_transferred
- GLSA-202310-12 (opens in a new tab)vendor-advisoryx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2023-28320)Record last updated .