CVE-2021-0254 (GCVE-0-2021-0254)

Vulnerability from cvelistv5 – Published: 2021-04-22 19:37 – Updated: 2024-09-16 20:11
VLAI?
Title
Junos OS: Remote code execution vulnerability in overlayd service
Summary
A buffer size validation vulnerability in the overlayd service of Juniper Networks Junos OS may allow an unauthenticated remote attacker to send specially crafted packets to the device, triggering a partial Denial of Service (DoS) condition, or leading to remote code execution (RCE). Continued receipt and processing of these packets will sustain the partial DoS. The overlayd daemon handles Overlay OAM packets, such as ping and traceroute, sent to the overlay. The service runs as root by default and listens for UDP connections on port 4789. This issue results from improper buffer size validation, which can lead to a buffer overflow. Unauthenticated attackers can send specially crafted packets to trigger this vulnerability, resulting in possible remote code execution. overlayd runs by default in MX Series, ACX Series, and QFX Series platforms. The SRX Series does not support VXLAN and is therefore not vulnerable to this issue. Other platforms are also vulnerable if a Virtual Extensible LAN (VXLAN) overlay network is configured. This issue affects Juniper Networks Junos OS: 15.1 versions prior to 15.1R7-S9; 17.3 versions prior to 17.3R3-S11; 17.4 versions prior to 17.4R2-S13, 17.4R3-S4; 18.1 versions prior to 18.1R3-S12; 18.2 versions prior to 18.2R2-S8, 18.2R3-S7; 18.3 versions prior to 18.3R3-S4; 18.4 versions prior to 18.4R1-S8, 18.4R2-S7, 18.4R3-S7; 19.1 versions prior to 19.1R2-S2, 19.1R3-S4; 19.2 versions prior to 19.2R1-S6, 19.2R3-S2; 19.3 versions prior to 19.3R3-S1; 19.4 versions prior to 19.4R2-S4, 19.4R3-S1; 20.1 versions prior to 20.1R2-S1, 20.1R3; 20.2 versions prior to 20.2R2, 20.2R2-S1, 20.2R3; 20.3 versions prior to 20.3R1-S1.
Severity ?
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-131 - Incorrect Calculation of Buffer Size
  • Denial of Service (DoS)
Assigner
References
Impacted products
Vendor Product Version
Juniper Networks Junos OS Affected: 15.1 , < 15.1R7-S9 (custom)
Affected: 17.3 , < 17.3R3-S11 (custom)
Affected: 17.4 , < 17.4R2-S13, 17.4R3-S4 (custom)
Affected: 18.1 , < 18.1R3-S12 (custom)
Affected: 18.2 , < 18.2R2-S8, 18.2R3-S7 (custom)
Affected: 18.3 , < 18.3R3-S4 (custom)
Affected: 18.4 , < 18.4R1-S8, 18.4R2-S7, 18.4R3-S7 (custom)
Affected: 19.1 , < 19.1R2-S2, 19.1R3-S4 (custom)
Affected: 19.2 , < 19.2R1-S6, 19.2R3-S2 (custom)
Affected: 19.3 , < 19.3R3-S1 (custom)
Affected: 19.4 , < 19.4R2-S4, 19.4R3-S1 (custom)
Affected: 20.1 , < 20.1R2-S1, 20.1R3 (custom)
Affected: 20.2 , < 20.2R2, 20.2R2-S1, 20.2R3 (custom)
Affected: 20.3 , < 20.3R1-S1 (custom)
Create a notification for this product.
Credits
Juniper SIRT would like to acknowledge and thank Hoàng Thạch Nguyễn (d4rkn3ss) of STAR Labs for responsibly reporting this vulnerability.
Show details on NVD website
To clipboard 

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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.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • 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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