Junos OS Evolved: PTX10003 Series: MAC address validation bypass vulnerability
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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 21.4R3-S4-EVO, 22.1R3-S3-EVO, 23.2R2-EVO
- 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 Origin Validation vulnerability in MAC address validation of Juniper Networks Junos OS Evolved on PTX10003 Series allows a network-adjacent attacker to bypass MAC address checking, allowing MAC addresses not intended to reach the adjacent LAN to be forwarded to the downstream network. Due to this issue, the router will start forwarding traffic if a valid route is present in forwarding-table, causing a loop and congestion in the downstream layer-2 domain connected to the device. This issue affects Juniper Networks Junos OS Evolved on PTX10003 Series: • All versions prior to 21.4R3-S4-EVO; • 22.1 versions prior to 22.1R3-S3-EVO; • 22.2 version 22.2R1-EVO and later versions; • 22.3 versions prior to 22.3R2-S2-EVO, 22.3R3-S1-EVO; • 22.4 versions prior to 22.4R2-S1-EVO, 22.4R3-EVO; • 23.2 versions prior to 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 Evolved
fixed in 21.4R3-S4-EVO; From 22.1 · fixed in 22.1R3-S3-EVO; From 22.2R1-EVO; From 23.2 · fixed in 23.2R2-EVO