An Improper Validation of Syntactic Correctness of Input vulnerability in Intrusion Detection and Prevention (IDP) of Juniper Networks SRX Series and MX Series allows an unauthenticated, network-based attacker to cause Denial of Service (DoS). Continued receipt of this specific packet will cause a sustained Denial of Service condition.
On all SRX Series and MX Series platforms, where IDP is enabled and a specific malformed SSL packet is received, the SSL detector crashes leading to an FPC core.
This issue affects Juniper Networks SRX Series and MX Series prior to SigPack 3598.
In order to identify the current SigPack version, following command can be used.
show security idp security-package-version
For this issue to occur, IDP policy has to be enabled on the SRX and MX Series devices to inspect the HTTPS traffic.
[ security idp active-policy policy-name ]
[ security idp idp-policy policy-name rulebase-ips rule rule-name ]
Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
This issue was seen during production usage.
This issue has been assigned CVE-2023-28985.
The following software releases have been updated to resolve this specific issue: SigPack 3598, and all subsequent releases.
This issue is being tracked as 1655071
Note: Juniper SIRT's policy is not to evaluate releases which are beyond End of Engineering (EOE) or End of Life (EOL).
2023-07-12: Initial Publication