CVE-2021-0277
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2021
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
Junos OS and Junos OS Evolved: LLDP Out-of-Bounds Read vulnerability in l2cpd
An Out-of-bounds Read vulnerability in the processing of specially crafted LLDP frames by the Layer 2 Control Protocol Daemon (l2cpd) of Juniper Networks Junos OS and Junos OS Evolved may allow an attacker to cause a Denial of Service (DoS), or may lead to remote code execution (RCE). Continued receipt and processing of these frames, sent from the local broadcast domain, will repeatedly crash the l2cpd process and sustain the Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS: 12.3 versions prior to 12.3R12-S18; 15.1 versions prior to 15.1R7-S9; 17.3 versions prior to 17.3R3-S12; 17.4 versions prior to 17.4R2-S13, 17.4R3-S5; 18.1 versions prior to 18.1R3-S13; 18.2 versions prior to 18.2R3-S8; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R2-S8, 18.4R3-S8; 19.1 versions prior to 19.1R3-S5; 19.2 versions prior to 19.2R3-S3; 19.3 versions prior to 19.3R2-S6, 19.3R3-S2; 19.4 versions prior to 19.4R1-S4, 19.4R2-S4, 19.4R3-S3; 20.1 versions prior to 20.1R2-S2, 20.1R3; 20.2 versions prior to 20.2R3-S1; 20.3 versions prior to 20.3R2-S1, 20.3R3; 20.4 versions prior to 20.4R2. Juniper Networks Junos OS Evolved versions prior to 20.4R2-EVO.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Junos OS
- Vendor
- Juniper Networks
- Product
- Junos OS
- Platforms
- Unknown
- Default status
Unknown
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 12.3 | affected | custom | 12.3R12-S18 | Unavailable | None listed |
| 15.1 | affected | custom | 15.1R7-S9 | Unavailable | None listed |
| 17.3 | affected | custom | 17.3R3-S12 | Unavailable | None listed |
| 17.4 | affected | custom | 17.4R2-S13, 17.4R3-S5 | Unavailable | None listed |
| 18.1 | affected | custom | 18.1R3-S13 | Unavailable | None listed |
| 18.2 | affected | custom | 18.2R3-S8 | Unavailable | None listed |
| 18.3 | affected | custom | 18.3R3-S5 | Unavailable | None listed |
| 18.4 | affected | custom | 18.4R2-S8, 18.4R3-S8 | Unavailable | None listed |
| 19.1 | affected | custom | 19.1R3-S5 | Unavailable | None listed |
| 19.2 | affected | custom | 19.2R3-S3 | Unavailable | None listed |
| 19.3 | affected | custom | 19.3R2-S6, 19.3R3-S2 | Unavailable | None listed |
| 19.4 | affected | custom | 19.4R1-S4, 19.4R2-S4, 19.4R3-S3 | Unavailable | None listed |
| 20.1 | affected | custom | 20.1R2-S2, 20.1R3 | Unavailable | None listed |
| 20.2 | affected | custom | 20.2R3-S1 | Unavailable | None listed |
| 20.3 | affected | custom | 20.3R2-S1, 20.3R3 | Unavailable | None listed |
| 20.4 | affected | custom | 20.4R2 | Unavailable | None listed |
Junos OS Evolved
- Vendor
- Juniper Networks
- Product
- Junos OS Evolved
- Platforms
- Unknown
- Default status
Unknown
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| unspecified | affected | custom | 20.4R2-EVO | Unavailable | None listed |