### Summary
Insecure 3DES ciphers are used which may lead to exploitation of the [Sweet32 vulnerability](https://sweet32.info/). Specifically, the ciphers TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA (secp256r1) and TLS_RSA_WITH_3DES_EDE_CBC_SHA (rsa 2048) are allowed. See CVE-2016-2183. This is fixed in Kyverno v1.9.5 and v1.10.0 and no known users have been affected.

### Details

The ciphers in affected versions can be read using the following command which uses `nmap`:

“`sh
$ kubectl exec -it mypod -n kyverno sh
kubectl exec [POD] [COMMAND] is DEPRECATED and will be removed in a future version. Use kubectl exec [POD] — [COMMAND] instead.
**nmap -sV –script ssl-enum-ciphers -p 443 kyverno-cleanup-controller** or
**nmap -sV –script ssl-enum-ciphers -p 443 kyverno-svc**
Starting Nmap 7.92 ( https://nmap.org ) at 2023-05-26 10:55 UTC
Nmap scan report for kyverno-cleanup-controller (10.103.199.233)
Host is up (0.000058s latency).
rDNS record for 10.103.199.233: kyverno-cleanup-controller.kyverno.svc.cluster.local

PORT STATE SERVICE VERSION
443/tcp open ssl/http Golang net/http server (Go-IPFS json-rpc or InfluxDB API)
| ssl-enum-ciphers:
| TLSv1.2:
| ciphers:
**| TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA (secp256r1) – C**
| TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA (secp256r1) – A
| TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (secp256r1) – A
| TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA (secp256r1) – A
| TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (secp256r1) – A
| TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 (secp256r1) – A
**| TLS_RSA_WITH_3DES_EDE_CBC_SHA (rsa 2048) – C**
| TLS_RSA_WITH_AES_128_CBC_SHA (rsa 2048) – A
| TLS_RSA_WITH_AES_128_GCM_SHA256 (rsa 2048) – A
| TLS_RSA_WITH_AES_256_CBC_SHA (rsa 2048) – A
| TLS_RSA_WITH_AES_256_GCM_SHA384 (rsa 2048) – A
| compressors:
| NULL
| cipher preference: client
| warnings:
| 64-bit block cipher 3DES vulnerable to SWEET32 attack
| TLSv1.3:
| ciphers:
| TLS_AKE_WITH_AES_128_GCM_SHA256 (ecdh_x25519) – A
| TLS_AKE_WITH_AES_256_GCM_SHA384 (ecdh_x25519) – A
| TLS_AKE_WITH_CHACHA20_POLY1305_SHA256 (ecdh_x25519) – A
| cipher preference: server
|_ least strength: C

Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 12.72 seconds
“`Read More