Junos OS and Junos OS Evolved: Memory leak due to RSVP neighbor persistent error leading to kernel crash
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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-S9, 21.4R3-S5, 22.1R3-S5, 22.2R3-S3, 22.3R3-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 Handling of Exceptional Conditions vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a logically adjacent downstream RSVP neighbor to cause kernel memory exhaustion, leading to a kernel crash, resulting in a Denial of Service (DoS). The kernel memory leak and eventual crash will be seen when the downstream RSVP neighbor has a persistent error which will not be corrected. System kernel memory can be monitored through the use of the 'show system kernel memory' command as shown below: user@router> show system kernel memory Real memory total/reserved: 4130268/ 133344 Kbytes kmem map free: 18014398509110220 Kbytes This issue affects: Junos OS: • All versions before 20.4R3-S9, • All versions of 21.2, • from 21.4 before 21.4R3-S5, • from 22.1 before 22.1R3-S5, • from 22.2 before 22.2R3-S3, • from 22.3 before 22.3R3-S2, • from 22.4 before 22.4R3, • from 23.2 before 23.2R2; Junos OS Evolved: • All versions before 21.4R3-S5-EVO, • from 22.1-EVO before 22.1R3-S5-EVO, • from 22.2-EVO before 22.2R3-S3-EVO, • from 22.3-EVO before 22.3R3-S2-EVO, • from 22.4-EVO before 22.4R3-EVO, • from 23.2-EVO before 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
fixed in 20.4R3-S9; From 21.2R1; From 21.4 · fixed in 21.4R3-S5; From 22.1 · fixed in 22.1R3-S5; From 22.2 · fixed in 22.2R3-S3; From 22.3 · fixed in 22.3R3-S2; From 22.4 · fixed in 22.4R3; From 23.2 · fixed in 23.2R2
- Juniper Networks Junos OS Evolved
fixed in 21.4R3-S5-EVO; From 22.1-EVO · fixed in 22.1R3-S5-EVO; From 22.2-EVO · fixed in 22.2R3-S3-EVO; From 22.3-EVO · fixed in 22.3R3-S2-EVO; From 22.4-EVO · fixed in 22.4R3-EVO; From 23.2-EVO · fixed in 23.2R2-EVO