Junos OS: MX Series: In an AF scenario traffic can bypass configured lo0 firewall filters
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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-S3, 21.4R3-S5, 22.1R3, 22.2R3, and 1 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 Exposure of Resource to Wrong Sphere vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on MX Series allows an unauthenticated, network-based attacker to bypass the intended access restrictions. In an Abstracted Fabric (AF) scenario if routing-instances (RI) are configured, specific valid traffic destined to the device can bypass the configured lo0 firewall filters as it's received in the wrong RI context. This issue affects Juniper Networks Junos OS on MX Series: • All versions earlier than 20.4R3-S9; • 21.2 versions earlier than 21.2R3-S3; • 21.4 versions earlier than 21.4R3-S5; • 22.1 versions earlier than 22.1R3; • 22.2 versions earlier than 22.2R3; • 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-S3; From 21.4 · fixed in 21.4R3-S5; From 22.1 · fixed in 22.1R3; From 22.2 · fixed in 22.2R3; From 22.3 · fixed in 22.3R2