Junos OS and Junos OS Evolved: In an EVPN-VXLAN scenario specific ARP or NDP packets cause FPC to 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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 21.2R3-S7, 21.4R3-S4, 22.2R3-S1, 22.3R3-S1, 21.2R3-S7-EVO, and 4 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
A Missing Release of Memory after Effective Lifetime vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent, unauthenticated attacker to cause an FPC to crash, leading to Denial of Service (DoS). On all Junos OS and Junos OS Evolved platforms, in an EVPN-VXLAN scenario, when specific ARP packets are received on an IPv4 network, or specific NDP packets are received on an IPv6 network, kernel heap memory leaks, which eventually leads to an FPC crash and restart. This issue does not affect MX Series platforms. Heap size growth on FPC can be seen using below command. user@host> show chassis fpc Temp CPU Utilization (%) CPU Utilization (%) Memory Utilization (%) Slot State (C) Total Interrupt 1min 5min 15min DRAM (MB) Heap Buffer 0 Online 45 3 0 2 2 2 32768 19 0 <<<<<<< Heap increase in all fPCs This issue affects Junos OS: • All versions before 21.2R3-S7, • 21.4 versions before 21.4R3-S4, • 22.2 versions before 22.2R3-S1, • 22.3 versions before 22.3R3-S1, • 22.4 versions before 22.4R2-S2, 22.4R3. and Junos OS Evolved: • All versions before 21.2R3-S7-EVO, • 21.4-EVO versions before 21.4R3-S4-EVO, • 22.2-EVO versions before 22.2R3-S1-EVO, • 22.3-EVO versions before 22.3R3-S1-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 21.2R3-S7; From 21.4 · fixed in 21.4R3-S4; From 22.2 · fixed in 22.2R3-S1; From 22.3 · fixed in 22.3R3-S1
- Juniper Networks Junos OS Evolved
fixed in 21.2R3-S7-EVO; From 21.4-EVO · fixed in 21.4R3-S4-EVO; From 22.2-EVO · fixed in 22.2R3-S1-EVO; From 22.3-EVO · fixed in 22.3R3-S1-EVO; From 22.4-EVO · fixed in 22.4R3-EVO