Junos OS and Junos OS Evolved: Flaps of BFD sessions with authentication cause a ppmd memory leak
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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-S8, 21.4R3-S7, 22.1R3-S4, 22.2R3-S4, 22.3R3, and 6 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 Periodic Packet Management Daemon (ppmd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated adjacent attacker to cause a Denial-of-Service (DoS). When a BFD session configured with authentication flaps, ppmd memory can leak. Whether the leak happens depends on a race condition which is outside the attackers control. This issue only affects BFD operating in distributed aka delegated (which is the default behavior) or inline mode. Whether the leak occurs can be monitored with the following CLI command: > show ppm request-queue FPC Pending-request fpc0 2 request-total-pending: 2 where a continuously increasing number of pending requests is indicative of the leak. This issue affects: Junos OS: • All versions before 21.2R3-S8, • 21.4 versions before 21.4R3-S7, • 22.1 versions before 22.1R3-S4, • 22.2 versions before 22.2R3-S4, • 22.3 versions before 22.3R3, • 22.4 versions before 22.4R2-S2, 22.4R3. Junos OS Evolved: • All versions before 21.2R3-S8-EVO, • 21.4-EVO versions before 21.4R3-S7-EVO, • 22.2-EVO versions before 22.2R3-S4-EVO, • 22.3-EVO versions before 22.3R3-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-S8; From 21.4 · fixed in 21.4R3-S7; From 22.1 · fixed in 22.1R3-S4; From 22.2 · fixed in 22.2R3-S4; From 22.3 · fixed in 22.3R3
- Juniper Networks Junos OS Evolved
From 21.2-EVO · fixed in 21.2R3-S8-EVO; From 21.4-EVO · fixed in 21.4R3-S7-EVO; From 22.2-EVO · fixed in 22.2R3-S4-EVO; From 22.3-EVO · fixed in 22.3R3-EVO; From 22.4-EVO · fixed in 22.4R3-EVO; From 23.2-EVO · fixed in 23.2R1-EVO