CVE-2021-0277 is an Out-of-bounds Read vulnerability in Juniper Networks Junos OS and Junos OS Evolved, specifically within the Layer 2 Control Protocol Daemon (l2cpd) when processing specially crafted LLDP frames. This flaw can lead to a Denial of Service (DoS) by repeatedly crashing the l2cpd process, or potentially enable remote code execution (RCE). With a CVSS score of 8.8 (HIGH), the vulnerability is network-adjacent (AV:A) and requires no user interaction (UI:N), making it a significant threat. While there is no evidence of active exploitation (KEV: No) and no public exploit code (Metasploit, Nuclei, ExploitDB: None), the vulnerability has garnered some community discussion and media coverage, indicating awareness within the security community.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
12.3CPE matchmatch criteria | cpe:2.3:o:juniper:junos:12.3:-:*:*:*:*:*:* | ||
12.3CPE matchmatch criteria | cpe:2.3:o:juniper:junos:12.3:r1:*:*:*:*:*:* | ||
12.3CPE matchmatch criteria | cpe:2.3:o:juniper:junos:12.3:r10:*:*:*:*:*:* | ||
12.3CPE matchmatch criteria | cpe:2.3:o:juniper:junos:12.3:r10-s1:*:*:*:*:*:* | ||
12.3CPE matchmatch criteria | cpe:2.3:o:juniper:junos:12.3:r10-s2:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
The average CVE in this peer group has 0.2 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.