CVE-2023-36843: Junos OS: SRX Series: The PFE will crash on receiving malformed SSL traffic when Sky ATP is enabled
An Improper Handling of Inconsistent Special Elements vulnerability in the Junos Services Framework (jsf) module of Juniper Networks Junos OS allows an unauthenticated network based attacker to cause a crash in the Packet Forwarding Engine (pfe) and thereby resulting in a Denial of Service (DoS).
Upon receiving malformed SSL traffic, the PFE crashes. A manual restart will be needed to recover the device.
This issue only affects devices with Juniper Networks Advanced Threat Prevention (ATP) Cloud enabled with Encrypted Traffic Insights (configured via ‘security-metadata-streaming policy’).
This issue affects Juniper Networks Junos OS:
All versions prior to 20.4R3-S8, 20.4R3-S9; 21.1 version 21.1R1 and later versions; 21.2 versions prior to 21.2R3-S6; 21.3 versions prior to 21.3R3-S5; 21.4 versions prior to 21.4R3-S5; 22.1 versions prior to 22.1R3-S4; 22.2 versions prior to 22.2R3-S2; 22.3 versions prior to 22.3R2-S2, 22.3R3; 22.4 versions prior to 22.4R2-S1, 22.4R3;
Affected Software
Remediation
Information
Event History
Frequently Asked Questions
What is the severity of CVE-2023-36843?
CVE-2023-36843 is classified as a high severity vulnerability due to its potential to cause a Denial of Service.
How do I fix CVE-2023-36843?
To mitigate CVE-2023-36843, update your Junos OS to a fixed version provided in Juniper's security advisory.
Which versions of Junos OS are affected by CVE-2023-36843?
CVE-2023-36843 affects Junos OS versions prior to 20.4 and several subsequent releases up to 22.4.
What impact does CVE-2023-36843 have on network security?
CVE-2023-36843 allows an unauthenticated attacker to crash the Packet Forwarding Engine, resulting in a Denial of Service.
Is authentication required to exploit CVE-2023-36843?
No, CVE-2023-36843 can be exploited by an unauthenticated network-based attacker.