Security information¶
The MKE 3.7.14 patch release focuses exclusively on CVE mitigation. To this end, the following middleware component versions have been upgraded to resolve vulnerabilities in MKE:
[MKE-11916] Kubernetes 1.27.16
[MKE-11833] etcd 3.5.15
The following table details the specific CVEs addressed, including which images are affected per CVE.
CVE |
Status |
Image mitigated |
Problem details from upstream |
|---|---|---|---|
Resolved |
|
libcurl did not check the server certificate of TLS connections done to a host specified as an IP address, when built to use mbedTLS. libcurl would wrongly avoid using the set hostname function when the specified hostname was given as an IP address, therefore completely skipping the certificate check. This affects all uses of TLS protocols (HTTPS, FTPS, IMAPS, POPS3, SMTPS, etc). |
|
Resolved |
|
An attacker may cause an HTTP/2 endpoint to read arbitrary amounts of header data by sending an excessive number of CONTINUATION frames. Maintaining HPACK state requires parsing and processing all HEADERS and CONTINUATION frames on a connection. When a request’s headers exceed MaxHeaderBytes, no memory is allocated to store the excess headers, but they are still parsed. This permits an attacker to cause an HTTP/2 endpoint to read arbitrary amounts of header data, all associated with a request which is going to be rejected. These headers can include Huffman-encoded data which is significantly more expensive for the receiver to decode than for an attacker to send. The fix sets a limit on the amount of excess header frames we will process before closing a connection. |