CVE-2023-27536

Public on 2023-03-23
Modified on 2024-01-31
Description
The curl advisory describes this issue as follows:

libcurl would reuse a previously created connection even when the GSS delegation (CURLOPT_GSSAPI_DELEGATION) option had been changed that could have changed the user's permissions in a second transfer.

libcurl keeps previously used connections in a connection pool for subsequent transfers to reuse if one of them matches the setup. However, this GSS delegation setting was left out from the configuration match checks, making them match too easily, affecting krb5/kerberos/negotiate/GSSAPI transfers.
Severity
Medium severity
Medium
CVSS v3 Base Score
4.5
See breakdown

Affected Packages

Platform Package Release Date Advisory Status
Amazon Linux 1 curl 2023-04-13 ALAS-2023-1727 Fixed
Amazon Linux 2 - Core curl 2023-06-05 ALAS2-2023-2070 Fixed
Amazon Linux 2023 curl 2023-06-05 ALAS2023-2023-193 Fixed

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 4.5 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
NVD CVSSv3 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N