Junos OS: MX Series: Gathering statistics in a scaled SCU/DCU configuration will lead to a device 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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, 21.2R3-S6, 21.3R3-S5, 21.4R3, 22.1R3, and 2 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: yes
- Technical impact: partial
Summary
An Improper Check for Unusual or Exceptional Conditions vulnerability in the kernel of Juniper Network Junos OS on MX Series allows a network based attacker with low privileges to cause a denial of service. If a scaled configuration for Source class usage (SCU) / destination class usage (DCU) (more than 10 route classes) is present and the SCU/DCU statistics are gathered by executing specific SNMP requests or CLI commands, a 'vmcore' for the RE kernel will be seen which leads to a device restart. Continued exploitation of this issue will lead to a sustained DoS. This issue only affects MX Series devices with MPC10, MPC11 or LC9600, and MX304. No other MX Series devices are affected. This issue affects Juniper Networks Junos OS: • All versions earlier than 20.4R3-S9; • 21.2 versions earlier than 21.2R3-S6; • 21.3 versions earlier than 21.3R3-S5; • 21.4 versions earlier than 21.4R3; • 22.1 versions earlier than 22.1R3; • 22.2 versions earlier than 22.2R2; • 22.3 versions earlier than 22.3R2.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: yes · Technical impact: partial
- Record last updated
Affected versions
- Juniper Networks Junos OS
fixed in 20.4R3-S9; From 21.2 · fixed in 21.2R3-S6; From 21.3 · fixed in 21.3R3-S5; From 21.4 · fixed in 21.4R3; From 22.1 · fixed in 22.1R3; From 22.2 · fixed in 22.2R2; From 22.3 · fixed in 22.3R2