CVE-2023-27538
5.5
MEDIUM
CVSS 3.1
EPSS 0.01%
Description
An authentication bypass vulnerability exists in libcurl prior to v8.0.0 where it reuses a previously established SSH connection despite the fact that an SSH option was modified, which should have prevented reuse. libcurl maintains a pool of previously used connections to reuse them for subsequent transfers if the configurations match. However, two SSH settings were omitted from the configuration check, allowing them to match easily, potentially leading to the reuse of an inappropriate connection.
How to fix CVE-2023-27538
To remediate CVE-2023-27538, 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-2023-27538 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 | MEDIUM5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |