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.

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Advisories
Source ID Title
EUVD EUVD EUVD-2023-32027 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.
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Wed, 15 Jan 2025 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: hackerone

Published:

Updated: 2025-01-15T15:59:07.016Z

Reserved: 2023-03-14T00:00:00

Link: CVE-2023-28320

cve-icon Vulnrichment

Updated: 2024-08-02T12:38:24.752Z

cve-icon NVD

Status : Modified

Published: 2023-05-26T21:15:15.937

Modified: 2025-01-15T16:15:25.953

Link: CVE-2023-28320

cve-icon Redhat

Severity : Low

Publid Date: 2023-05-17T00:00:00Z

Links: CVE-2023-28320 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses