Junos OS and Junos OS Evolved: The l2ald crashes on receiving telemetry messages from a specific subscription
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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-S10, 21.2R3-S7, 21.4R3-S5, 22.1R3-S4, 22.2R3-S3, 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 Check for Unusual or Exceptional Conditions vulnerability in the Layer 2 Address Learning Daemon (l2ald) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, adjacent attacker to cause a Denial of Service (DoS). When telemetry requests are sent to the device, and the Dynamic Rendering Daemon (drend) is suspended, the l2ald crashes and restarts due to factors outside the attackers control. Repeated occurrences of these events causes a sustained DoS condition. This issue affects: Junos OS: • All versions earlier than 20.4R3-S10; • 21.2 versions earlier than 21.2R3-S7; • 21.4 versions earlier than 21.4R3-S5; • 22.1 versions earlier than 22.1R3-S4; • 22.2 versions earlier than 22.2R3-S3; • 22.3 versions earlier than 22.3R3-S1; • 22.4 versions earlier than 22.4R3; • 23.2 versions earlier than 23.2R1-S2, 23.2R2. Junos OS Evolved: • All versions earlier than 21.4R3-S5-EVO; • 22.1-EVO versions earlier than 22.1R3-S4-EVO; • 22.2-EVO versions earlier than 22.2R3-S3-EVO; • 22.3-EVO versions earlier than 22.3R3-S1-EVO; • 22.4-EVO versions earlier than 22.4R3-EVO; • 23.2-EVO versions earlier than 23.2R2-EVO.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- Juniper Networks Junos OS
From 20.4 · fixed in 20.4R3-S10; From 21.2 · fixed in 21.2R3-S7; From 21.4 · fixed in 21.4R3-S5; From 22.1 · fixed in 22.1R3-S4; From 22.2 · fixed in 22.2R3-S3; From 22.3 · fixed in 22.3R3-S1; From 22.4 · fixed in 22.4R3
- Juniper Networks Junos OS Evolved
From 21.4-EVO · fixed in 21.4R3-S5-EVO; From 22.1-EVO · fixed in 22.1R3-S4-EVO; From 22.2-EVO · fixed in 22.2R3-S3-EVO; From 22.3-EVO · fixed in 22.3R3-S1-EVO; From 22.4-EVO · fixed in 22.4R3-EVO; From 23.2-EVO · fixed in 23.2R2-EVO