Junos OS and Junos OS Evolved: An l2cpd crash will occur when specific LLDP packets are received
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 20.4R3-S8, 21.2R3-S5, 21.3R3-S4, 21.4R3-S3, 22.1R3-S2, and 8 more
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: no
- Technical impact: partial
Summary
An Improper Validation of Specified Quantity in Input vulnerability in the Layer-2 control protocols daemon (l2cpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated adjacent attacker who sends specific LLDP packets to cause a Denial of Service(DoS). This issue occurs when specific LLDP packets are received and telemetry polling is being done on the device. The impact of the l2cpd crash is reinitialization of STP protocols (RSTP, MSTP or VSTP), and MVRP and ERP. Also, if any services depend on LLDP state (like PoE or VoIP device recognition), then these will also be affected. This issue affects: Juniper Networks Junos OS • All versions prior to 20.4R3-S8; • 21.1 version 21.1R1 and later versions; • 21.2 versions prior to 21.2R3-S5; • 21.3 versions prior to 21.3R3-S4; • 21.4 versions prior to 21.4R3-S3; • 22.1 versions prior to 22.1R3-S2; • 22.2 versions prior to 22.2R3; • 22.3 versions prior to 22.3R2-S2; • 22.4 versions prior to 22.4R2; Juniper Networks Junos OS Evolved • All versions prior to 20.4R3-S8-EVO; • 21.1 version 21.1R1-EVO and later versions; • 21.2 versions prior to 21.2R3-S5-EVO; • 21.3 versions prior to 21.3R3-S4-EVO; • 21.4 versions prior to 21.4R3-S3-EVO; • 22.1 versions prior to 22.1R3-S2-EVO; • 22.2 versions prior to 22.2R3-EVO; • 22.3 versions prior to 22.3R2-S2-EVO; • 22.4 versions prior to 22.4R1-S1-EVO;
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- Juniper Networks Junos OS
fixed in 20.4R3-S8; From 21.1R1; From 21.2 · fixed in 21.2R3-S5; From 21.3 · fixed in 21.3R3-S4; From 21.4 · fixed in 21.4R3-S3; From 22.1 · fixed in 22.1R3-S2; From 22.2 · fixed in 22.2R3; From 22.4 · fixed in 22.4R2
- Juniper Networks Junos OS Evolved
fixed in 20.4R3-S8-EVO; From 21.1R1-EVO; From 21.2-EVO · fixed in 21.2R3-S5-EVO; From 21.3-EVO · fixed in 21.3R3-S4-EVO; From 21.4-EVO · fixed in 21.4R3-S3-EVO; From 22.1-EVO · fixed in 22.1R3-S2-EVO; From 22.2-EVO · fixed in 22.2R3-EVO