CVE-2021-31363 — Infinite Loop in Networks Junos OS

CWE-835 — Infinite Loop4 documents4 sources
Severity
6.5MEDIUMNVD
EPSS
0.1%
top 76.21%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
Juniper Networks Junos OSJuniper Networks Junos OS EvolvedJuniper Junos+1 more
Timeline
PublishedOct 19
Latest updateMay 24

Description

In an MPLS P2MP environment a Loop with Unreachable Exit Condition vulnerability in the routing protocol daemon (RPD) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated adjacent attacker to cause high load on RPD which in turn may lead to routing protocol flaps. If a system with sensor-based-stats enabled receives a specific LDP FEC this can lead to the above condition. Continued receipted of such an LDP FEC will create a sustained Denial of Service (DoS) condition. This…

CVSS vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 2.8 | Impact: 3.6

Affected Packages4 packages

▶CVEListV5juniper_networks/junos_os_evolvedunspecified — 20.1R2-S3-EVO+1
▶CVEListV5juniper_networks/junos_os19.2R2 — 19.2*+5
▶NVDjuniper/junos_os_evolved20.1, 20.2, 20.3+2
▶NVDjuniper/junos6 versions+5

Patches

Patch: kb.juniper.net ↗Patch: kb.juniper.net ↗

🔴Vulnerability Details

2
GHSA
GHSA-mh4w-qhp7-f8v8: In an MPLS P2MP environment a Loop with Unreachable Exit Condition vulnerability in the routing protocol daemon (RPD) of Juniper Networks Junos OS and↗2022-05-24
▶
CVEList
Junos OS and Junos OS Evolved: Receipt of a specific LDP message will cause a Denial of Service↗2021-10-19
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📋Vendor Advisories

1
Juniper
CVE-2021-31363: In an MPLS P2MP environment a Loop with Unreachable Exit Condition vulnerability in the routing protocol daemon (RPD) of Juniper Networks Junos OS and↗2021-10-19
▶
CVE-2021-31363 — Infinite Loop in Networks Junos OS | cvebase