Bug 1223176 (CVE-2024-32475)

Summary: VUL-0: CVE-2024-32475: envoy: abnormal termination when using auto_sni with authority header longer than 255 characters
Product: [openSUSE] openSUSE Distribution Reporter: SMASH SMASH <smash_bz>
Component: SecurityAssignee: Wolfgang Engel <wolfgang.engel>
Status: NEW --- QA Contact: Security Team bot <security-team>
Severity: Normal    
Priority: P3 - Medium CC: stoyan.manolov
Version: Leap 15.6   
Target Milestone: ---   
Hardware: Other   
OS: Other   
URL: https://smash.suse.de/issue/402625/
Whiteboard:
Found By: Security Response Team Services Priority:
Business Priority: Blocker: ---
Marketing QA Status: --- IT Deployment: ---

Description SMASH SMASH 2024-04-22 03:36:09 UTC 
Envoy is a cloud-native, open source edge and service proxy. When an upstream TLS cluster is used with `auto_sni` enabled, a request containing a `host`/`:authority` header longer than 255 characters triggers an abnormal termination of Envoy process. Envoy does not gracefully handle an error when setting SNI for outbound TLS connection. The error can occur when Envoy attempts to use the `host`/`:authority` header value longer than 255 characters as SNI for outbound TLS connection. SNI length is limited to 255 characters per the standard. Envoy always expects this operation to succeed and abnormally aborts the process when it fails. This vulnerability is fixed in 1.30.1, 1.29.4, 1.28.3, and 1.27.5.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-32475
https://www.cve.org/CVERecord?id=CVE-2024-32475
https://github.com/envoyproxy/envoy/commit/b47fc6648d7c2dfe0093a601d44cb704b7bad382
https://github.com/envoyproxy/envoy/security/advisories/GHSA-3mh5-6q8v-25wj
https://bugzilla.redhat.com/show_bug.cgi?id=2276149