Vulnerability CVE-2021-0206 - CERT Civis.Net

Vulnerability Name:

CVE-2021-0206 (CCN-194910)

Assigned:

2020-10-27

Published:

2021-01-13

Updated:

2021-01-21

Summary:

A NULL Pointer Dereference vulnerability in Juniper Networks Junos OS allows an attacker to send a specific packet causing the packet forwarding engine (PFE) to crash and restart, resulting in a Denial of Service (DoS). By continuously sending these specific packets, an attacker can repeatedly disable the PFE causing a sustained Denial of Service (DoS). This issue only affects Juniper Networks NFX Series, SRX Series platforms when SSL Proxy is configured. This issue affects Juniper Networks Junos OS on NFX Series and SRX Series: 18.3 versions prior to 18.3R3-S4; 18.4 versions prior to 18.4R3-S1; 19.1 versions prior to 19.1R1-S6, 19.1R2-S2, 19.1R3; 19.2 versions prior to 19.2R1-S2, 19.2R2; 19.3 versions prior to 19.3R2. This issue does not affect Juniper Networks Junos OS versions on NFX Series and SRX Series prior to 18.3R1.

CVSS v3 Severity:

7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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): None Integrity (I): None Availibility (A): High

7.5 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
6.5 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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): None Integrity (I): None Availibility (A): High

CVSS v2 Severity:

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

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

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

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

Vulnerability Type:

CWE-476
CWE-476

Vulnerability Consequences:

Denial of Service

References:

Source: MITRE
Type: CNA
CVE-2021-0206

Source: XF
Type: UNKNOWN
juniper-cve20210206-dos(194910)

Source: CCN
Type: Juniper Networks Security Bulletin JSA11096
Junos OS: NFX Series, SRX Series: PFE may crash upon receipt of specific packet when SSL Proxy is configured. (CVE-2021-0206)

Source: CONFIRM
Type: Vendor Advisory
https://kb.juniper.net/JSA11096

Vulnerable Configuration:

Configuration 1:

cpe:/o:juniper:junos:18.3:-:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.3:r1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.3:r1-s1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.3:r1-s2:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.3:r1-s3:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.3:r1-s5:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.3:r1-s6:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.3:r2:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.3:r2-s1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.3:r2-s2:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.3:r2-s3:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.3:r2-s4:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.3:r3:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.3:r3-s1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.3:r3-s2:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.3:r3-s3:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.4:-:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.4:r1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.4:r1-s1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.4:r1-s2:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.4:r1-s5:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.4:r1-s6:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.4:r2:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.4:r2-s1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.4:r2-s2:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.4:r2-s3:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.4:r2-s4:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.4:r3:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.1:-:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.1:r1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.1:r1-s1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.1:r1-s2:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.1:r1-s3:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.1:r1-s4:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.1:r1-s5:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.1:r2:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.1:r2-s1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.2:-:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.2:r1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.2:r1-s1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.3:-:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.3:r1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.3:r1-s1:*:*:*:*:*:*

AND

cpe:/h:juniper:nfx150:-:*:*:*:*:*:*:*

OR cpe:/h:juniper:nfx250:-:*:*:*:*:*:*:*

OR cpe:/h:juniper:nfx350:-:*:*:*:*:*:*:*

OR cpe:/h:juniper:srx1500:-:*:*:*:*:*:*:*

OR cpe:/h:juniper:srx300:-:*:*:*:*:*:*:*

OR cpe:/h:juniper:srx320:-:*:*:*:*:*:*:*

OR cpe:/h:juniper:srx340:-:*:*:*:*:*:*:*

OR cpe:/h:juniper:srx345:-:*:*:*:*:*:*:*

OR cpe:/h:juniper:srx380:-:*:*:*:*:*:*:*

OR cpe:/h:juniper:srx4100:-:*:*:*:*:*:*:*

OR cpe:/h:juniper:srx4200:-:*:*:*:*:*:*:*

OR cpe:/h:juniper:srx4600:-:*:*:*:*:*:*:*

OR cpe:/h:juniper:srx5400:-:*:*:*:*:*:*:*

OR cpe:/h:juniper:srx550:-:*:*:*:*:*:*:*

OR cpe:/h:juniper:srx5600:-:*:*:*:*:*:*:*

OR cpe:/h:juniper:srx5800:-:*:*:*:*:*:*:*

Configuration CCN 1:

cpe:/o:juniper:junos:18.3:-:*:*:*:*:*:*

OR cpe:/o:juniper:junos:18.4:-:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.1:-:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.2:-:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.3:-:*:*:*:*:*:*

Denotes that component is vulnerable