CVE-2021-31360 (GCVE-0-2021-31360)

Vulnerability from cvelistv5 – Published: 2021-10-19 18:16 – Updated: 2024-09-17 01:31
VLAI?
Title
Junos OS and Junos OS Evolved: Denial of Service vulnerability in local file processing
Summary
An improper privilege management vulnerability in the Juniper Networks Junos OS and Junos OS Evolved command-line interpreter (CLI) allows a low-privileged user to overwrite local files as root, possibly leading to a system integrity issue or Denial of Service (DoS). Depending on the files overwritten, exploitation of this vulnerability could lead to a sustained Denial of Service (DoS) condition, requiring manual user intervention to recover. Systems are only vulnerable if jdhcpd is running, which can be confirmed via the 'show system processes' command. For example: root@host# run show system processes extensive | match dhcp 26537 root -16 0 97568K 13692K RUN 0 0:01 3.71% jdhcpd This issue affects: Juniper Networks Junos OS: All versions, including the following supported releases: 15.1 versions prior to 15.1R7-S10; 17.4 versions prior to 17.4R3-S5; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R3-S9; 19.1 versions prior to 19.1R3-S6; 19.2 versions prior to 19.2R1-S7, 19.2R3-S3; 19.3 versions prior to 19.3R2-S6, 19.3R3-S3; 19.4 versions prior to 19.4R3-S6; 20.1 versions prior to 20.1R2-S2, 20.1R3-S1; 20.2 versions prior to 20.2R3-S2; 20.3 versions prior to 20.3R3; 20.4 versions prior to 20.4R2-S1, 20.4R3; 21.1 versions prior to 21.1R1-S1, 21.1R2. Juniper Networks Junos OS Evolved: All versions prior to 20.4R2-S3-EVO; All versions of 21.1-EVO.
Severity ?
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
CWE
  • CWE-269 - Improper Privilege Management
  • CWE-20 - Improper Input Validation
  • Denial of Service (DoS)
Assigner
References
https://kb.juniper.net/JSA11222 x_refsource_CONFIRM
Impacted products
Vendor Product Version
Juniper Networks Junos OS Affected: 15.1 , < 15.1R7-S10 (custom)
Affected: 17.4 , < 17.4R3-S5 (custom)
Affected: 18.3 , < 18.3R3-S5 (custom)
Affected: 18.4 , < 18.4R3-S9 (custom)
Affected: 19.1 , < 19.1R3-S6 (custom)
Affected: 19.2 , < 19.2R1-S7, 19.2R3-S3 (custom)
Affected: 19.3 , < 19.3R2-S6, 19.3R3-S3 (custom)
Affected: 19.4 , < 19.4R3-S6 (custom)
Affected: 20.1 , < 20.1R2-S2, 20.1R3-S1 (custom)
Affected: 20.2 , < 20.2R3-S2 (custom)
Affected: 20.3 , < 20.3R3 (custom)
Affected: 20.4 , < 20.4R2-S1, 20.4R3 (custom)
Affected: 21.1 , < 21.1R1-S1, 21.1R2 (custom)
Create a notification for this product.
    Juniper Networks Junos OS Evolved Affected: unspecified , < 20.4R2-S3-EVO (custom)
Affected: 21.1R1-EVO , < 21.1* (custom)
Create a notification for this product.
Credits
Juniper SIRT would like to acknowledge and thank awxylitol for responsibly reporting this vulnerability.
Show details on NVD website
To clipboard 

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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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