Junos OS: MX Series: Decapsulation of specific GRE packets leads to PFE reset
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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-S9, 21.4R3-S8, 22.2R3-S4, 22.4R3-S5, 23.2R2-S2, 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 Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (pfe) of Juniper Networks Junos OS on MX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).When processing a high rate of specific GRE traffic destined to the device, the respective PFE will hang causing traffic forwarding to stop. When this issue occurs the following logs can be observed: <fpc #> MQSS(0): LI-3: Received a parcel with more than 512B accompanying data CHASSISD_FPC_ASIC_ERROR: ASIC Error detected <...> This issue affects Junos OS: • all versions before 21.2R3-S9, • 21.4 versions before 21.4R3-S8, • 22.2 versions before 22.2R3-S4, • 22.4 versions before 22.4R3-S5, • 23.2 versions before 23.2R2-S2, • 23.4 versions before 23.4R2.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: yes · Technical impact: partial
- Record last updated
Affected versions
- Juniper Networks Junos OS
fixed in 21.2R3-S9; From 21.4 · fixed in 21.4R3-S8; From 22.2 · fixed in 22.2R3-S4; From 22.4 · fixed in 22.4R3-S5; From 23.2 · fixed in 23.2R2-S2; From 23.4 · fixed in 23.4R2