Bug 1203837 – VUL-0: kernel: Layer 2 network filtering capabilities such as IPv6 RA guard can be bypassed using LLC/SNAP headers with invalid length and Ethernet to Wifi frame conversion

Bug 1203837 - VUL-0: kernel: Layer 2 network filtering capabilities such as IPv6 RA guard can be bypassed using LLC/SNAP headers with invalid length and Ethernet to Wifi frame conversion


Summary:	VUL-0: kernel: Layer 2 network filtering capabilities such as IPv6 RA guard c...

Status:	RESOLVED DUPLICATE of bug 1182623

Classification:	Novell Products
Product:	SUSE Security Incidents
Classification:	Novell Products
Component:	Incidents
Version:	unspecified
Hardware:	Other Other

Priority:	P5 - None Severity: Normal
Target Milestone:	---
Assigned To:	Kernel Bugs
QA Contact:	Security Team bot

URL:	https://smash.suse.de/issue/343695/
Whiteboard:	CVSSv3.1:SUSE:CVE-2021-27862:5.3:(AV:...
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Reported:	2022-09-28 11:47 UTC by Robert Frohl
Modified:	2022-10-11 09:22 UTC (History)
CC List:	1 user (show)

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Found By:	Security Response Team
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Description Robert Frohl 2022-09-28 11:47:18 UTC

CVE-2021-27862

Layer 2 network filtering capabilities such as IPv6 RA guard can be bypassed
using LLC/SNAP headers with invalid length and Ethernet to Wifi frame conversion
(and optionally VLAN0 headers).

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-27862
https://www.cve.org/CVERecord?id=CVE-2021-27862
https://standards.ieee.org/ieee/802.2/1048/
https://datatracker.ietf.org/doc/draft-ietf-v6ops-ra-guard/08/

Comment 1 Robert Frohl 2022-09-28 12:09:31 UTC

1182623

*** This bug has been marked as a duplicate of bug 1182623 ***