CVE-2023-28985 Denial of service in Junos OS
An unauthenticated attacker can cause a sustained Denial of Service on Juniper SRX and MX devices by sending a malformed SSL packet when IDP is enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-28985?
CVE-2023-28985 is a high-severity denial of service vulnerability in Juniper Junos, published on 14 Jul 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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:
user@junos# show security idp security-package-version
Weakness: CWE-1286
Which versions are affected by CVE-2023-28985?
It affects 1 product.
Products include Juniper Junos.
How do I fix CVE-2023-28985?
No fix has been published for CVE-2023-28985 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2023-28985 being exploited?
There is no known exploitation of CVE-2023-28985 in the wild and no public exploit code.
Other vulnerabilities in Juniper Junos
- CVE-2023-36845 Juniper Junos OS EX Series and SRX Series PHP External Variable Modification
- CVE-2020-1631 Juniper Junos OS Path Traversal
- CVE-2025-21590 Juniper Junos OS Improper Isolation or Compartmentalization
- CVE-2023-36851 Juniper Junos OS SRX Series Missing Authentication for Critical Function
- CVE-2023-36844 Juniper Junos OS EX Series PHP External Variable Modification
Sources
Also known as GHSA-qr5c-3grv-7gcm.