Bug 2179092 (CVE-2023-27536) - CVE-2023-27536 curl: GSS delegation too eager connection re-use
Summary: CVE-2023-27536 curl: GSS delegation too eager connection re-use
Keywords:
Status: NEW
Alias: CVE-2023-27536
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Nobody
QA Contact:
URL:
Whiteboard:
Depends On: 2179118 2179120 2179122 2180431 2180432 2213541
Blocks: 2178228
TreeView+ depends on / blocked
 
Reported: 2023-03-16 15:57 UTC by Marian Rehak
Modified: 2024-06-17 18:30 UTC (History)
17 users (show)

Fixed In Version: curl 8.0.0
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in the Curl package. Libcurl keeps previously used connections in a connection pool for subsequent transfers to reuse if one of them matches the setup. However, the GSS delegation setting was left out from the configuration match checks, making them match too easily, affecting krb5/kerberos/negotiate/GSSAPI transfers.
Clone Of:
Environment:
Last Closed:
Embargoed:

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2023:4523 0 None None None 2023-08-08 08:19:56 UTC
Red Hat Product Errata RHSA-2023:6679 0 None None None 2023-11-07 08:22:34 UTC
Red Hat Product Errata RHSA-2024:0428 0 None None None 2024-01-24 16:49:11 UTC

Description Marian Rehak 2023-03-16 15:57:09 UTC 
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.
Comment 2 Sandipan Roy 2023-03-21 13:04:33 UTC 
Created curl tracking bugs for this issue:

Affects: fedora-all [bug 2180431]


Created mingw-curl tracking bugs for this issue:

Affects: fedora-all [bug 2180432]
Comment 6 errata-xmlrpc 2023-08-08 08:19:55 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2023:4523 https://access.redhat.com/errata/RHSA-2023:4523
Comment 7 errata-xmlrpc 2023-11-07 08:22:31 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2023:6679 https://access.redhat.com/errata/RHSA-2023:6679
Comment 9 errata-xmlrpc 2024-01-24 16:49:09 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Extended Update Support

Via RHSA-2024:0428 https://access.redhat.com/errata/RHSA-2024:0428
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