medium
5.9
CWE
287 305
Advisory Published
CVE Published
Updated

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

Affected SoftwareAffected VersionHow to fix
IBM Engineering Requirements Management DOORS Web Access<=9.7.2.7
IBM Rational DOORS Web Access<=9.7.2.7
redhat/curl<8.0.0
8.0.0
libcurl>=7.22.0<=7.88.1
Red Hat Fedora=36
Debian Linux=10.0
NetApp Active IQ Unified Manager for VMware vSphere
All of
NetApp H300S Firmware
NetApp H300S Firmware
All of
NetApp H500e Firmware
NetApp H500e Firmware
All of
NetApp H700S
NetApp H700S
All of
NetApp H410S
NetApp H410S Firmware
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 Firmware
NetApp H500e Firmware
NetApp H500e Firmware
NetApp H700S
NetApp H700S
NetApp H410S
NetApp H410S Firmware

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

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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