Junos OS: QFX5000 Series and EX4000 Series: Denial of Service (DoS) on a large scale VLAN due to PFE hogging
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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 21.1R3-S5, 21.2R3-S5, 21.3R3-S5, 21.4R3-S4, 22.1R3-S3, 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 Allocation of Resources Without Limits or Throttling vulnerability in Juniper Networks Junos OS allows an unauthenticated, network-based attacker to cause Denial of Service (DoS). On all Junos OS QFX5000 Series and EX4000 Series platforms, when a high number of VLANs are configured, a specific DHCP packet will cause PFE hogging which will lead to dropping of socket connections. This issue affects: Juniper Networks Junos OS on QFX5000 Series and EX4000 Series • 21.1 versions prior to 21.1R3-S5; • 21.2 versions prior to 21.2R3-S5; • 21.3 versions prior to 21.3R3-S5; • 21.4 versions prior to 21.4R3-S4; • 22.1 versions prior to 22.1R3-S3; • 22.2 versions prior to 22.2R3-S1; • 22.3 versions prior to 22.3R2-S2, 22.3R3; • 22.4 versions prior to 22.4R2. This issue does not affect Juniper Networks Junos OS versions prior to 21.1R1
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: yes · Technical impact: partial
- Record last updated
Affected versions
- Juniper Networks Junos OS
From 21.1 · fixed in 21.1R3-S5; From 21.2 · fixed in 21.2R3-S5; From 21.3 · fixed in 21.3R3-S5; From 21.4 · fixed in 21.4R3-S4; From 22.1 · fixed in 22.1R3-S3; From 22.2 · fixed in 22.2R3-S1; From 22.4 · fixed in 22.4R2