CVE-2023-28320

medium

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.

References

http://seclists.org/fulldisclosure/2023/Jul/47

http://seclists.org/fulldisclosure/2023/Jul/48

http://seclists.org/fulldisclosure/2023/Jul/52

https://hackerone.com/reports/1929597

https://security.gentoo.org/glsa/202310-12

https://security.netapp.com/advisory/ntap-20230609-0009/

https://support.apple.com/kb/HT213843

https://support.apple.com/kb/HT213844

https://support.apple.com/kb/HT213845

Details

Source: Mitre, NVD

Published: 2023-05-26

CVSS v3

Base Score: 5.9

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Severity: Medium