CVE-2023-27536
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.
Does this matter?
Lower severity and a low EPSS score (1.57%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 5.9 MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 1.57% probability · 74th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-305, CWE-287
- Affected
- haxx/libcurl · fedoraproject/fedora · debian/debian linux · netapp/active iq unified manager · netapp/h300s firmware · netapp/h500s firmware · netapp/h700s firmware · netapp/h410s firmware · netapp/ontap · splunk/universal forwarder
- Source
- support@hackerone.com
References
- https://hackerone.com/reports/1895135Exploit, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/04/msg00025.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/36NBD5YLJXXEDZLDGNFCERWRYJQ6LAQW/Mailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202310-12Third Party Advisory
- https://security.netapp.com/advisory/ntap-20230420-0010/Third Party Advisory
- https://hackerone.com/reports/1895135Exploit, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/04/msg00025.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/36NBD5YLJXXEDZLDGNFCERWRYJQ6LAQW/Mailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202310-12Third Party Advisory
- https://security.netapp.com/advisory/ntap-20230420-0010/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.