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CVE-2021-0267 (GCVE-0-2021-0267)

Vulnerability from cvelistv5 – Published: 2021-04-22 19:37 – Updated: 2024-09-17 03:54
VLAI
Title
Junos OS: Receipt of a crafted DHCP packet will cause the jdhcpd DHCP service to core.
Summary
An Improper Input Validation vulnerability in the active-lease query portion in JDHCPD's DHCP Relay Agent of Juniper Networks Junos OS allows an attacker to cause a Denial of Service (DoS) by sending a crafted DHCP packet to the device thereby crashing the jdhcpd DHCP service. This is typically configured for Broadband Subscriber Sessions. Continued receipt and processing of this crafted packet will create a sustained Denial of Service (DoS) condition. This issue affects Juniper Networks Junos OS: 19.4 versions prior to 19.4R3-S1; 20.1 versions prior to 20.1R2-S1, 20.1R3; 20.2 versions prior to 20.2R3; 20.3 versions prior to 20.3R2. This issue does not affect Junos OS Evolved.
Severity
7.4 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CWE
  • CWE-20 - Improper Input Validation
  • Denial of Service (DoS)
Assigner
References
Impacted products
Vendor Product Version CPE status
Juniper Networks Junos OS Affected: 19.4 , < 19.4R3-S1 (custom)
Affected: 20.1 , < 20.1R2-S1, 20.1R3 (custom)
Affected: 20.2 , < 20.2R3 (custom)
Affected: 20.3 , < 20.3R2 (custom)
guessed Create a notification for this product.
Date Public
2021-04-14 00:00
Show details on NVD website
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      "status": "final",
      "title": "Junos OS: Receipt of a crafted DHCP packet will cause the jdhcpd DHCP service to core.",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-0267.json",
      "version": "3"
    }
  }
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.