First published: Tue Oct 19 2021(Updated: )
An Improper Check for Unusual or Exceptional Conditions vulnerability combined with a Race Condition in the flow daemon (flowd) of Juniper Networks Junos OS on SRX300 Series, SRX500 Series, SRX1500, and SRX5000 Series with SPC2 allows an unauthenticated network based attacker sending specific traffic to cause a crash of the flowd/srxpfe process, responsible for traffic forwarding in SRX, which will cause a Denial of Service (DoS). Continued receipt and processing of this specific traffic will create a sustained Denial of Service (DoS) condition. This issue can only occur when specific packets are trying to create the same session and logging for session-close is configured as a policy action. Affected platforms are: SRX300 Series, SRX500 Series, SRX1500, and SRX5000 Series with SPC2. Not affected platforms are: SRX4000 Series, SRX5000 Series with SPC3, and vSRX Series. This issue affects Juniper Networks Junos OS SRX300 Series, SRX500 Series, SRX1500, and SRX5000 Series with SPC2: All versions prior to 17.4R3-S5; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R3-S9; 19.1 versions prior to 19.1R3-S6; 19.2 versions prior to 19.2R1-S7, 19.2R3-S2; 19.3 versions prior to 19.3R2-S6, 19.3R3-S2; 19.4 versions prior to 19.4R1-S4, 19.4R3-S3; 20.1 versions prior to 20.1R2-S2, 20.1R3; 20.2 versions prior to 20.2R3; 20.3 versions prior to 20.3R2-S1, 20.3R3; 20.4 versions prior to 20.4R2.
Credit: sirt@juniper.net
Affected Software | Affected Version | How to fix |
---|---|---|
Juniper JUNOS | =17.4 | |
Juniper JUNOS | =17.4-r1 | |
Juniper JUNOS | =17.4-r1-s1 | |
Juniper JUNOS | =17.4-r1-s2 | |
Juniper JUNOS | =17.4-r1-s3 | |
Juniper JUNOS | =17.4-r1-s4 | |
Juniper JUNOS | =17.4-r1-s5 | |
Juniper JUNOS | =17.4-r1-s6 | |
Juniper JUNOS | =17.4-r1-s7 | |
Juniper JUNOS | =17.4-r2 | |
Juniper JUNOS | =17.4-r2-s1 | |
Juniper JUNOS | =17.4-r2-s10 | |
Juniper JUNOS | =17.4-r2-s11 | |
Juniper JUNOS | =17.4-r2-s12 | |
Juniper JUNOS | =17.4-r2-s13 | |
Juniper JUNOS | =17.4-r2-s2 | |
Juniper JUNOS | =17.4-r2-s3 | |
Juniper JUNOS | =17.4-r2-s4 | |
Juniper JUNOS | =17.4-r2-s5 | |
Juniper JUNOS | =17.4-r2-s6 | |
Juniper JUNOS | =17.4-r2-s7 | |
Juniper JUNOS | =17.4-r2-s8 | |
Juniper JUNOS | =17.4-r2-s9 | |
Juniper JUNOS | =17.4-r3 | |
Juniper JUNOS | =17.4-r3-s1 | |
Juniper JUNOS | =17.4-r3-s2 | |
Juniper JUNOS | =17.4-r3-s3 | |
Juniper JUNOS | =17.4-r3-s4 | |
Juniper JUNOS | =18.3 | |
Juniper JUNOS | =18.3-r | |
Juniper JUNOS | =18.3-r1 | |
Juniper JUNOS | =18.3-r1-s1 | |
Juniper JUNOS | =18.3-r1-s2 | |
Juniper JUNOS | =18.3-r1-s3 | |
Juniper JUNOS | =18.3-r1-s4 | |
Juniper JUNOS | =18.3-r1-s5 | |
Juniper JUNOS | =18.3-r1-s6 | |
Juniper JUNOS | =18.3-r2 | |
Juniper JUNOS | =18.3-r2-s1 | |
Juniper JUNOS | =18.3-r2-s2 | |
Juniper JUNOS | =18.3-r2-s3 | |
Juniper JUNOS | =18.3-r2-s4 | |
Juniper JUNOS | =18.3-r3 | |
Juniper JUNOS | =18.3-r3-s1 | |
Juniper JUNOS | =18.3-r3-s2 | |
Juniper JUNOS | =18.3-r3-s3 | |
Juniper JUNOS | =18.3-r3-s4 | |
Juniper JUNOS | =18.4 | |
Juniper JUNOS | =18.4-r1 | |
Juniper JUNOS | =18.4-r1-s1 | |
Juniper JUNOS | =18.4-r1-s2 | |
Juniper JUNOS | =18.4-r1-s3 | |
Juniper JUNOS | =18.4-r1-s4 | |
Juniper JUNOS | =18.4-r1-s5 | |
Juniper JUNOS | =18.4-r1-s6 | |
Juniper JUNOS | =18.4-r1-s7 | |
Juniper JUNOS | =18.4-r2 | |
Juniper JUNOS | =18.4-r2-s1 | |
Juniper JUNOS | =18.4-r2-s2 | |
Juniper JUNOS | =18.4-r2-s3 | |
Juniper JUNOS | =18.4-r2-s4 | |
Juniper JUNOS | =18.4-r2-s5 | |
Juniper JUNOS | =18.4-r2-s6 | |
Juniper JUNOS | =18.4-r2-s7 | |
Juniper JUNOS | =18.4-r2-s8 | |
Juniper JUNOS | =18.4-r3 | |
Juniper JUNOS | =18.4-r3-s1 | |
Juniper JUNOS | =18.4-r3-s10 | |
Juniper JUNOS | =18.4-r3-s2 | |
Juniper JUNOS | =18.4-r3-s3 | |
Juniper JUNOS | =18.4-r3-s4 | |
Juniper JUNOS | =18.4-r3-s5 | |
Juniper JUNOS | =18.4-r3-s6 | |
Juniper JUNOS | =18.4-r3-s7 | |
Juniper JUNOS | =18.4-r3-s8 | |
Juniper JUNOS | =19.1 | |
Juniper JUNOS | =19.1-r1 | |
Juniper JUNOS | =19.1-r1-s1 | |
Juniper JUNOS | =19.1-r1-s2 | |
Juniper JUNOS | =19.1-r1-s3 | |
Juniper JUNOS | =19.1-r1-s4 | |
Juniper JUNOS | =19.1-r1-s5 | |
Juniper JUNOS | =19.1-r1-s6 | |
Juniper JUNOS | =19.1-r2 | |
Juniper JUNOS | =19.1-r2-s1 | |
Juniper JUNOS | =19.1-r2-s2 | |
Juniper JUNOS | =19.1-r2-s3 | |
Juniper JUNOS | =19.1-r3 | |
Juniper JUNOS | =19.1-r3-s1 | |
Juniper JUNOS | =19.1-r3-s2 | |
Juniper JUNOS | =19.1-r3-s3 | |
Juniper JUNOS | =19.1-r3-s4 | |
Juniper JUNOS | =19.1-r3-s5 | |
Juniper JUNOS | =19.2 | |
Juniper JUNOS | =19.2-r1 | |
Juniper JUNOS | =19.2-r1-s1 | |
Juniper JUNOS | =19.2-r1-s2 | |
Juniper JUNOS | =19.2-r1-s3 | |
Juniper JUNOS | =19.2-r1-s4 | |
Juniper JUNOS | =19.2-r1-s5 | |
Juniper JUNOS | =19.2-r1-s6 | |
Juniper JUNOS | =19.2-r3 | |
Juniper JUNOS | =19.2-r3-s1 | |
Juniper JUNOS | =19.3 | |
Juniper JUNOS | =19.3-r1 | |
Juniper JUNOS | =19.3-r1-s1 | |
Juniper JUNOS | =19.3-r2 | |
Juniper JUNOS | =19.3-r2-s1 | |
Juniper JUNOS | =19.3-r2-s2 | |
Juniper JUNOS | =19.3-r2-s3 | |
Juniper JUNOS | =19.3-r2-s4 | |
Juniper JUNOS | =19.3-r2-s5 | |
Juniper JUNOS | =19.3-r3 | |
Juniper JUNOS | =19.3-r3-s1 | |
Juniper JUNOS | =19.4-r1 | |
Juniper JUNOS | =19.4-r1-s1 | |
Juniper JUNOS | =19.4-r1-s2 | |
Juniper JUNOS | =19.4-r1-s3 | |
Juniper JUNOS | =19.4-r3 | |
Juniper JUNOS | =19.4-r3-s1 | |
Juniper JUNOS | =19.4-r3-s2 | |
Juniper JUNOS | =20.1-r1 | |
Juniper JUNOS | =20.1-r1-s1 | |
Juniper JUNOS | =20.1-r1-s2 | |
Juniper JUNOS | =20.1-r1-s3 | |
Juniper JUNOS | =20.1-r1-s4 | |
Juniper JUNOS | =20.1-r2 | |
Juniper JUNOS | =20.1-r2-s1 | |
Juniper JUNOS | =20.2-r1 | |
Juniper JUNOS | =20.2-r1-s1 | |
Juniper JUNOS | =20.2-r1-s2 | |
Juniper JUNOS | =20.2-r1-s3 | |
Juniper JUNOS | =20.2-r2 | |
Juniper JUNOS | =20.2-r2-s1 | |
Juniper JUNOS | =20.2-r2-s2 | |
Juniper JUNOS | =20.2-r2-s3 | |
Juniper JUNOS | =20.3-r1 | |
Juniper JUNOS | =20.3-r1-s1 | |
Juniper JUNOS | =20.3-r2 | |
Juniper JUNOS | =20.4-r1 | |
Juniper JUNOS | =20.4-r1-s1 | |
Juniper Srx1500 | ||
Juniper Srx300 | ||
Juniper Srx320 | ||
Juniper Srx340 | ||
Juniper Srx345 | ||
Juniper Srx380 | ||
Juniper Srx5000 | ||
Juniper Srx5400 | ||
Juniper Srx550 | ||
Juniper Srx550 Hm | ||
Juniper Srx550m | ||
Juniper Srx5600 | ||
Juniper Srx5800 |
The following software releases have been updated to resolve this specific issue: 17.4R3-S5, 18.3R3-S5, 18.4R3-S9, 19.1R3-S6, 19.2R1-S7, 19.2R3-S2, 19.3R2-S6, 19.3R3-S2, 19.4R1-S4, 19.4R3-S3, 20.1R2-S2, 20.1R3, 20.2R3, 20.3R2-S1, 20.3R3, 20.4R2, 21.1R1, and all subsequent releases.
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
An Improper Check for Unusual or Exceptional Conditions vulnerability combined with a Race Condition in the flow daemon (flowd) of Juniper Networks Junos OS.
The severity of CVE-2021-31364 vulnerability is rated as medium with a CVSS score of 5.9.
Juniper JUNOS versions 17.4 to 20.4 are affected by the CVE-2021-31364 vulnerability.
You can find more information about CVE-2021-31364 vulnerability at the Juniper Networks Security Advisories page.
No, Juniper Srx1500 is not vulnerable to the CVE-2021-31364 vulnerability.