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CVE-2021-0264— Junos OS and Junos OS Evolved: MX Series with MPC10/MPC11, PTX10003, PTX10008: Line card may crash and restart when traffic is hitting a firewall filter having a term with syslog action configured

Quick assessment

Affected
Juniper Networks Junos OS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Juniper Networks Junos OS是美国瞻博网络（Juniper Networks）公司的一套专用于该公司的硬件设备的网络操作系统。该操作系统提供了安全编程接口和Junos SDK。 Junos OS 存在安全漏洞，目前尚无此漏洞的相关信息，请随时关注CNNVD或厂商公告。

CVSS 5.9 · Medium EPSS 0.98% · P59

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2021-0264

Vulnerability Information
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Vulnerability Title
Junos OS and Junos OS Evolved: MX Series with MPC10/MPC11, PTX10003, PTX10008: Line card may crash and restart when traffic is hitting a firewall filter having a term with syslog action configured
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the processing of traffic matching a firewall filter containing a syslog action in Juniper Networks Junos OS on MX Series with MPC10/MPC11 cards installed, PTX10003 and PTX10008 Series devices, will cause the line card to crash and restart, creating a Denial of Service (DoS). Continued receipt and processing of packets matching the firewall filter can create a sustained Denial of Service (DoS) condition. When traffic hits the firewall filter, configured on lo0 or any physical interface on the line card, containing a term with a syslog action (e.g. 'term <name> then syslog'), the affected line card will crash and restart, impacting traffic processing through the ports of the line card. This issue only affects MX Series routers with MPC10 or MPC11 line cards, and PTX10003 or PTX10008 Series packet transport routers. No other platforms or models of line cards are affected by this issue. Note: This issue has also been identified and described in technical service bulletin TSB17931 (login required). This issue affects: Juniper Networks Junos OS on MX Series: 19.3 versions prior to 19.3R3-S2; 19.4 versions prior to 19.4R3-S2; 20.1 versions prior to 20.1R3; 20.2 versions prior to 20.2R2-S2, 20.2R3; 20.3 versions prior to 20.3R3; 20.4 versions prior to 20.4R2. Juniper Networks Junos OS Evolved on PTX10003, PTX10008: All versions prior to 20.4R2-EVO. This issue does not affect Juniper Networks Junos OS versions prior to 19.3R1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对异常条件检查或处理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Juniper Networks Junos OS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Juniper Networks Junos OS是美国瞻博网络（Juniper Networks）公司的一套专用于该公司的硬件设备的网络操作系统。该操作系统提供了安全编程接口和Junos SDK。 Junos OS 存在安全漏洞，目前尚无此漏洞的相关信息，请随时关注CNNVD或厂商公告。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Juniper Networks Junos OS unspecified ~ 19.3R1 -
Juniper Networks Junos OS 19.3 ~ 19.3R3-S2 -
Juniper Networks Junos OS Evolved unspecified ~ 20.4R2-EVO -

II. Public POCs for CVE-2021-0264

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III. Intelligence Information for CVE-2021-0264

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Vendor Advisories for CVE-2021-0264 (2)

Same Patch Batch · Juniper Networks · 2021-04-22 · 53 CVEs total

CVE-2021-0248 10.0 CRITICAL NFX Series: Hard-coded credentials allow an attacker to take control of any instance throu
CVE-2021-0254 9.8 CRITICAL Junos OS: Remote code execution vulnerability in overlayd service
CVE-2021-0275 8.8 HIGH Junos OS: J-Web: Cross-site scripting attack allows an attacker to gain control of another
CVE-2021-0268 8.8 HIGH Junos OS: J-Web has an Improper Neutralization of CRLF Sequences in its HTTP Headers which
CVE-2021-0269 8.8 HIGH Junos OS: J-Web can be compromised through reflected client-side HTTP parameter pollution
CVE-2021-0251 8.6 HIGH Junos OS: MX Series with MS-PIC, MS-SPC3, MS-MIC or MS-MPC: The BRAS Subscriber Services s
CVE-2021-0249 8.1 HIGH Junos OS: SRX Series: A remote attacker may be able to cause a PFE buffer overflow to arbi
CVE-2021-0266 8.1 HIGH cSRX: Use of Hard-coded Cryptographic Keys allows an attacker to take control of the devic
CVE-2021-0265 8.1 HIGH Contrail Insights: The REST API implementation allows an unauthenticated remote attacker t
CVE-2021-0252 7.8 HIGH Junos OS: NFX Series: Local Code Execution Vulnerability in JDMD Leads to Privilege Escala
CVE-2021-0245 7.8 HIGH Junos OS: Junos Fusion: Hard-coded credentials on satellite devices allows a locally authe
CVE-2021-0253 7.8 HIGH Junos OS: NFX Series: Local Command Execution Vulnerability in JDMD Leads to Privilege Esc
CVE-2021-0261 7.5 HIGH Junos OS: Denial of Service vulnerability in J-Web and web based (HTTP/HTTPS) services cau
CVE-2021-0250 7.5 HIGH Junos OS and Junos OS Evolved: An attacker sending a specific crafted BGP update message w
CVE-2021-0227 7.5 HIGH Junos OS: SRX Series: Denial of Service in J-Web upon receipt of crafted HTTP packets
CVE-2021-0270 7.5 HIGH Junos OS: PTX Series, QFX10K Series: A PTX/QFX FPC may restart unexpectedly with the "inli
CVE-2021-0233 7.5 HIGH Junos OS: ACX500 Series, ACX4000 Series: Denial of Service due to FFEB crash while process
CVE-2021-0230 7.5 HIGH Junos OS: SRX Series: Memory leak when querying Aggregated Ethernet (AE) interface statist
CVE-2021-0267 7.4 HIGH Junos OS: Receipt of a crafted DHCP packet will cause the jdhcpd DHCP service to core.
CVE-2021-0240 7.4 HIGH Junos OS: Receipt of malformed DHCPv6 packets causes jdhcpd to crash and restart.

Showing top 20 of 53 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Junos OS
Same vendor: Juniper Networks
Same weakness: CWE-703

V. Comments for CVE-2021-0264

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