CVE-2023-27536
5.9
MEDIUM
CVSS 3.1
EPSS 0.01%
Description
An authentication bypass vulnerability exists libcurl <8.0.0 in the connection reuse feature which can reuse previously established connections with incorrect user permissions due to a failure to check for changes in the CURLOPT_GSSAPI_DELEGATION option. This vulnerability affects krb5/kerberos/negotiate/GSSAPI transfers and could potentially result in unauthorized access to sensitive information. The safest option is to not reuse connections if the CURLOPT_GSSAPI_DELEGATION option has been changed.
How to fix CVE-2023-27536
To remediate CVE-2023-27536, upgrade the affected package to a fixed version below.
- —upgrade to 8.0.1-r0 or later
- —upgrade to 7.74.0-1.3+deb11u8 or later
Is CVE-2023-27536 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 8.0.1-r0
- from 0, < 7.74.0-1.3+deb11u8
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |