Junos OS: MX10k Series: 'show system firmware' CLI command may lead to LC480 or LC2101 line card 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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-S10, 21.4R3-S9, 22.2R3-S7, 22.4R3-S6, 23.2R2-S2, 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: no
- Technical impact: partial
Summary
A Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability in the method to collect FPC Ethernet firmware statistics of Juniper Networks Junos OS on MX10k Series allows a local, low-privileged attacker executing the 'show system firmware' CLI command to cause an LC480 or LC2101 line card to reset. On MX10k Series systems with LC480 or LC2101 line cards, repeated execution of the 'show system firmware' CLI command can cause the line card to crash and restart. Additionally, some time after the line card crashes, chassisd may also crash and restart, generating a core dump.This issue affects Junos OS on MX10k Series: • all versions before 21.2R3-S10, • from 21.4 before 21.4R3-S9, • from 22.2 before 22.2R3-S7, • from 22.4 before 22.4R3-S6, • from 23.2 before 23.2R2-S2, • from 23.4 before 23.4R2-S3, • from 24.2 before 24.2R2.
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-S10; From 21.4 · fixed in 21.4R3-S9; From 22.2 · fixed in 22.2R3-S7; From 22.4 · fixed in 22.4R3-S6; From 23.2 · fixed in 23.2R2-S2; From 23.4 · fixed in 23.4R2-S3; From 24.2 · fixed in 24.2R2