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CVE record · CVE-2021-31366

Junos OS: MX Series: In subscriber management / BBE configuration authd can crash if a subscriber with a specific username tries to login leading to a DoS

CVSS 6.5 MediumEPSS 0.0042 · 36th percentile

Published by the CVE Program (CNA: juniper) at 19 Oct 2021, 18:16 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
Juniper Networks Junos OS
  • affected 15.1 to before 15.1R7-S9 custom
  • affected 17.3 to before 17.3R3-S12 custom
  • affected 17.4 to before 17.4R3-S5 custom
  • affected 18.1 to before 18.1R3-S13 custom
  • affected 18.2 to before 18.2R3-S8 custom
  • affected 18.3 to before 18.3R3-S5 custom
  • affected 18.4 to before 18.4R3-S9 custom
  • affected 19.1 to before 19.1R3-S6 custom
  • affected 19.2 to before 19.2R1-S7, 19.2R3-S3 custom
  • affected 19.3 to before 19.3R2-S6, 19.3R3-S3 custom
  • affected 19.4 to before 19.4R3-S3 custom
  • affected 20.1 to before 20.1R3 custom
  • and 4 more
Identifiers
CVE-2021-31366
CNA
juniper
Weakness (CWE)
CWE-252
Tags
Published
19 Oct 2021
Updated
17 Sept 2024

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
6.5 Medium 3.1 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CNA (juniper)
  • CISA KEV Not listed.
  • EPSS 0.0042, the 36th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 19 Oct 2021. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.