VDB
CVE-2021-27854
CVE-2021-27854
PUBLISHED
Layer 2 (L2) Netzwerksicherheitskontrollen, die von Switches, Routern und Betriebssystemen genutzt werden, können durch das Stapeln von Ethernet-Protokoll-Headern umgangen werden. Ein Angreifer aus dem angrenzenden Netzwerk kann dies ausnutzen indem er manipulierte Pakete über anfällige Geräte sendet. In der Folge kann er einen Denial-of-Service- oder einen Man-in-the-Middle Angriff gegen ein Zielnetzwerk durchzuführen.
EPSS 0.11% · 28.6th percentile
Risk Scores
EPSS Score
0.11%
28.6th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Juniper | Juniper JUNOS | |
| Cisco | Cisco Small Business | |
| Cisco | Cisco Nexus | |
| Arista | Arista WiFi Access Point | |
| Arista | Arista EOS | |
| Cisco | Cisco Catalyst | |
| Cisco | Cisco Industrial Ethernet Switches | |
| Extreme Networks | Extreme Networks ExtremeXOS | |
| Cisco | Cisco IOS XR | |
| Broadcom | Broadcom Brocade Switch |
Exploit Intelligence
- https://www.kb.cert.org/vuls/id/855201 (circl)
- https://blog.champtar.fr/VLAN0_LLC_SNAP/ (circl)
- https://datatracker.ietf.org/doc/draft-ietf-v6ops-ra-guard/08/ (circl)
- https://standards.ieee.org/ieee/802.2/1048/ (circl)
- https://standards.ieee.org/ieee/802.1Q/10323/ (circl)
- https://kb.cert.org/vuls/id/855201 (circl)
Timeline
- Sep 27, 2022 CVE Published
- Sep 28, 2022 EPSS Score
- Nov 11, 2022 EPSS Score
- Dec 26, 2022 EPSS Score
- Feb 8, 2023 EPSS Score
- Mar 7, 2023 EPSS Score
- Mar 25, 2023 EPSS Score
- May 8, 2023 EPSS Score
- Jun 22, 2023 EPSS Score
- Aug 5, 2023 EPSS Score
- Sep 19, 2023 EPSS Score
- Nov 2, 2023 EPSS Score
References
- https://wid.cert-bund.de/.well-known/csaf/white/2022/wid-sec-w-2022-1551.json advisory
- https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2022-1551 advisory
- https://www.arista.com/jp/support/advisories-notices/security-advisory/16276-security-advisory-0080 advisory
- https://www.kb.cert.org/vuls/id/855201 advisory
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-VU855201-J3z8CKTX advisory
- https://www.arista.com/en/support/advisories-notices/security-advisory/16276-security-advisory-0080 advisory
- https://support.lenovo.com/us/en/product_security/LEN-68035 advisory
- https://extremeportal.force.com/ExtrArticleDetail?an=000107398 advisory
- https://extremeportal.force.com/ExtrArticleDetail?an=000107396 advisory