CVE-2023-27536
First published: Thu Mar 16 2023(Updated: )
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.
Credit: support@hackerone.com support@hackerone.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/curl | <8.0.0 | 8.0.0 |
| IBM IBM® Engineering Requirements Management DOORS | <=9.7.2.7 | |
| IBM IBM® Engineering Requirements Management DOORS Web Access | <=9.7.2.7 | |
| Haxx Libcurl | >=7.22.0<=7.88.1 | |
| Fedoraproject Fedora | =36 | |
| Debian Debian Linux | =10.0 | |
| Netapp Active Iq Unified Manager Vmware Vsphere | ||
| All of | ||
| Netapp H300s Firmware | ||
| Netapp H300s | ||
| All of | ||
| Netapp H500s Firmware | ||
| Netapp H500s | ||
| All of | ||
| Netapp H700s Firmware | ||
| Netapp H700s | ||
| All of | ||
| Netapp H410s Firmware | ||
| Netapp H410s | ||
| Netapp Ontap | =9 | |
| Splunk Universal Forwarder | >=8.2.0<8.2.12 | |
| Splunk Universal Forwarder | >=9.0.0<9.0.6 | |
| Splunk Universal Forwarder | =9.1.0 | |
| Netapp H300s Firmware | ||
| Netapp H300s | ||
| Netapp H500s Firmware | ||
| Netapp H500s | ||
| Netapp H700s Firmware | ||
| Netapp H700s | ||
| Netapp H410s Firmware | ||
| Netapp H410s |
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Reference Links
- https://hackerone.com/reports/1895135
- https://lists.debian.org/debian-lts-announce/2023/04/msg00025.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/36NBD5YLJXXEDZLDGNFCERWRYJQ6LAQW/
- https://security.gentoo.org/glsa/202310-12
- https://security.netapp.com/advisory/ntap-20230420-0010/
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2180431
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2180432
- https://access.redhat.com/errata/RHSA-2023:4523
- https://access.redhat.com/errata/RHSA-2023:6679
- https://access.redhat.com/errata/RHSA-2024:0428
- https://bugzilla.redhat.com/show_bug.cgi?id=2179092
- https://exchange.xforce.ibmcloud.com/vulnerabilities/250531
- https://www.ibm.com/support/pages/node/7124058 (Advisory)
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/36NBD5YLJXXEDZLDGNFCERWRYJQ6LAQW/
Frequently Asked Questions
What is CVE-2023-27536?
CVE-2023-27536 is an authentication bypass vulnerability in libcurl that allows the reuse of previously established connections with incorrect user permissions.
Which software is affected by CVE-2023-27536?
CVE-2023-27536 affects libcurl versions prior to 8.0.0 and various operating systems and applications that use libcurl, such as Red Hat, Fedora, Debian, and Apple macOS.
What is the severity of CVE-2023-27536?
The severity of CVE-2023-27536 is medium, with a CVSSv3 score of 5.9.
How can I fix CVE-2023-27536?
To fix CVE-2023-27536, you need to update libcurl to version 8.0.0 or higher, or apply the relevant security patches provided by your operating system or software vendor.
Where can I find more information about CVE-2023-27536?
You can find more information about CVE-2023-27536 on the official Red Hat Bugzilla page and the Red Hat Security Advisory.
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