Junos OS Evolved: Specially crafted packets may cause the AFT manager process to crash and restart (Juniper Networks Junos OS Evolved)
At a glance
- Source
- NVD
- EPSS
- EPSS 1.06 % · percentile 64 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- juniper
- NVD status
- Modified
Description
A vulnerability in the handling of exceptional conditions in Juniper Networks Junos OS Evolved (EVO) allows an attacker to send specially crafted packets to the device, causing the Advanced Forwarding Toolkit manager (evo-aftmand-bt or evo-aftmand-zx) process to crash and restart, impacting all traffic going through the FPC, resulting in a Denial of Service (DoS). Continued receipt and processing of these packets will create a sustained Denial of Service (DoS) condition. Following messages will be logged prior to the crash: Feb 2 10:14:39 fpc0 evo-aftmand-bt[16263]: [Error] Nexthop: Failed to get fwd nexthop for nexthop:32710470974358 label:1089551617 for session:18 probe:35 Feb 2 10:14:39 fpc0 evo-aftmand-bt[16263]: [Error] Nexthop: Failed to get fwd nexthop for nexthop:19241453497049 label:1089551617 for session:18 probe:37 Feb 2 10:14:39 fpc0 evo-aftmand-bt[16263]: [Error] Nexthop: Failed to get fwd nexthop for nexthop:19241453497049 label:1089551617 for session:18 probe:44 Feb 2 10:14:39 fpc0 evo-aftmand-bt[16263]: [Error] Nexthop: Failed to get fwd nexthop for nexthop:32710470974358 label:1089551617 for session:18 probe:47 Feb 2 10:14:39 fpc0 audit[16263]: ANOM_ABEND auid=4294967295 uid=0 gid=0 ses=4294967295 pid=16263 comm="EvoAftManBt-mai" exe="/usr/sbin/evo-aftmand-bt" sig=11 Feb 2 10:14:39 fpc0 kernel: audit: type=1701 audit(1612260879.272:17): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=16263 comm="EvoAftManBt-mai" exe="/usr/sbin/evo-aftmand-bt" sig=1 This issue affects Juniper Networks Junos OS Evolved: All versions prior to 20.4R2-EVO; 21.1 versions prior to 21.1R2-EVO.
Weaknesses (CWE)
- CWE-703 — Improper Check or Handling of Exceptional Conditions
- CWE-754 — Improper Check for Unusual or Exceptional Conditions
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | juniper |
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | NVD · sirt@juniper.net (Secondary) |
| CVSS 2.0 | HIGH 7.8 | AV:N/AC:L/Au:N/C:N/I:N/A:C | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2021-2905
- GCVE · GCVE-0-2021-0286
CERT-FR advisories
- CERTFR-2021-AVI-526 — Multiples vulnérabilités les produits Juniper · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:juniper:junos_os_evolved:19.2:r1:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:19.2:r2:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:19.3:r1:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:19.3:r2:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:19.4:r1:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:19.4:r2:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:19.4:r2-s1:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:20.1:-:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:20.1:r1:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:20.1:r1-s1:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:20.2:-:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:20.3:-:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:20.3:r1:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:20.4:r1:*:*:*:*:*:*cpe:2.3:o:juniper:junos_os_evolved:21.1:r1:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Juniper Networks · Junos OS Evolved | affected unspecified < 20.4R2-EVO ; affected 21.1 < 21.1R2-EVO |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |