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Forum Discussion

Dave_Pisarek's avatar
Dave_Pisarek
Icon for Cirrus rankCirrus
Jul 12, 2022

ASM signtures for CVE-2022-21445

Are there signatures to protect against this Oracle vulnerability? https://www.oracle.com/security-alerts/cpuapr2022.html
security
LiefZimmerman's avatar
LiefZimmerman
Icon for Admin rankAdmin
Jul 15, 2022

A couple folks took a look around and we don't see anything official or otherwise. Odd.

I recommend opening a support case at https://support.f5.com/csp/home and requesting an escalation to the ASM Rules Team so that an official and authoritative answer is provided.

It would be great to have any resulting KB article linked here too.
Hope that helps.

Lief

AaronJB's avatar
AaronJB
Ret. Employee
Jul 20, 2022

I'd agree with Lief - reading up on this CVE, it seems to be a Java deserialization gadget accessible prior to authentication. On that basis it's quite likely that there are existing ASM signatures which would trigger during exploitation, but your best route to get that confirmed is by opening a case with the Support organisation who will be able to escalate to the dedicated Threat Research team.

For what it's worth, I looked to see if any other customers had asked the question which would have resulted in an escalation, but there are zero references to that CVE that I can find.

I also couldn't find a good end-to-end PoC; the original writeup points to exploitation via chaining CVE-2022-21445 with a second CVE (from 2020), but they don't reveal the requests they make, only the end results