Junos OS and Junos OS Evolved: When BGP rib-sharding and update-threading are configured and a peer flaps, an rpd core is observed
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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-S6, 21.3R3-S5, 21.4R3-S4, 22.1R3-S3, and 10 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 routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, logically adjacent BGP peer to cause Denial of Service (DoS). On all Junos OS and Junos OS Evolved platforms, when BGP rib-sharding and update-threading are configured, and a BGP peer flap is done with specific timing, rpd crashes and restarts. Continuous peer flapping at specific time intervals will result in a sustained Denial of Service (DoS) condition. This issue affects eBGP and iBGP, in both IPv4 and IPv6 implementations. This issue requires a remote attacker to have at least one established BGP session. The issue can occur with or without logical-systems enabled. This issue affects: Junos OS: • All versions before 20.4R3-S8, • 21.2 versions before 21.2R3-S6, • 21.3 versions before 21.3R3-S5, • 21.4 versions before 21.4R3-S4, • 22.1 versions before 22.1R3-S3, • 22.2 versions before 22.2R3-S1, • 22.3 versions before 22.3R3, • 22.4 versions before 22.4R3. Junos OS Evolved: • All versions before 21.2R3-S6-EVO, • 21.3-EVO versions before 21.3R3-S5-EVO, • 21.4-EVO versions before 21.4R3-S4-EVO, • 22.1-EVO versions before 22.1R3-S3-EVO, • 22.2-EVO versions before :22.2R3-S1-EVO, • 22.3-EVO versions before 22.3R3-EVO, • 22.4-EVO versions before 22.4R3-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 21.2 · fixed in 21.2R3-S6; From 21.3 · fixed in 21.3R3-S5; From 21.4 · fixed in 21.4R3-S4; From 22.1 · fixed in 22.1R3-S3; From 22.2 · fixed in 22.2R3-S1; From 22.3 · fixed in 22.3R3; From 22.4 · fixed in 22.4R3
- Juniper Networks Junos OS Evolved
fixed in 21.2R3-S6-EVO; From 21.3-EVO · fixed in 21.3R3-S5-EVO; From 21.4-EVO · fixed in 21.4R3-S4-EVO; From 22.1-EVO · fixed in 22.1R3-S3-EVO; From 22.2-EVO · fixed in 22.2R3-S1-EVO; From 22.3-EVO · fixed in 22.3R3-EVO; From 22.4-EVO · fixed in 22.4R3-EVO