Vulnerability CVE-2021-0276

Vulnerability Name:

CVE-2021-0276 (CCN-205422)

Assigned:

2020-10-27

Published:

2021-07-14

Updated:

2022-08-05

Summary:

A stack-based Buffer Overflow vulnerability in Juniper Networks SBR Carrier with EAP (Extensible Authentication Protocol) authentication configured, allows an attacker sending specific packets causing the radius daemon to crash resulting with a Denial of Service (DoS) or leading to remote code execution (RCE). By continuously sending this specific packets, an attacker can repeatedly crash the radius daemon, causing a sustained Denial of Service (DoS). This issue affects Juniper Networks SBR Carrier: 8.4.1 versions prior to 8.4.1R19; 8.5.0 versions prior to 8.5.0R10; 8.6.0 versions prior to 8.6.0R4.

CVSS v3 Severity:

9.8 Critical (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
8.5 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): High Integrity (I): High Availibility (A): High

9.8 Critical (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
8.5 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): High Integrity (I): High Availibility (A): High

CVSS v2 Severity:

6.8 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Medium Authentication (Au): None
Impact Metrics:	Confidentiality (C): Partial Integrity (I): Partial Availibility (A): Partial

10.0 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Athentication (Au): None
Impact Metrics:	Confidentiality (C): Complete Integrity (I): Complete Availibility (A): Complete

Vulnerability Type:

CWE-787

Vulnerability Consequences:

Gain Access

References:

Source: MITRE
Type: CNA
CVE-2021-0276

Source: XF
Type: UNKNOWN
juniper-cve20210276-bo(205422)

Source: CCN
Type: Juniper Networks Security Bulletin JSA11180
Steel-Belted Radius Carrier Edition: Remote code execution vulnerability when EAP Authentication is configured. (CVE-2021-0276)

Source: CONFIRM
Type: Vendor Advisory
https://kb.juniper.net/JSA11180

Vulnerable Configuration:

Configuration 1:

cpe:/a:juniper:steel-belted_radius_carrier:8.4.1:-:*:*:*:*:*:*

OR cpe:/a:juniper:steel-belted_radius_carrier:8.4.1:r13:*:*:*:*:*:*

OR cpe:/a:juniper:steel-belted_radius_carrier:8.5.0:-:*:*:*:*:*:*

OR cpe:/a:juniper:steel-belted_radius_carrier:8.5.0:r4:*:*:*:*:*:*

OR cpe:/a:juniper:steel-belted_radius_carrier:8.6.0:*:*:*:*:*:*:*

Denotes that component is vulnerable

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