MORE POSTS
March 08, 2022 2:59 PM
CVE-2022-26143: TP240PhoneHome reflection/amplification DDoS attack vector
A new reflection/amplification distributed denial-of-service (DDoS) vector with a record-breaking potential amplification ratio of 4,294,967,296:1 has been abused by attackers in the wild to launch multiple high-impact DDoS attacks...
February 01, 2022 5:28 PM
Announcing the public launch of Cloudflare's bug bounty program
Today we are launching Cloudflare’s paid public bug bounty program. We believe bug bounties are a vital part of every security team’s toolbox and have been working hard on improving and expanding our private bug bounty program over the last few years...
December 15, 2021 1:56 PM
Protection against CVE-2021-45046, the additional Log4j RCE vulnerability
This vulnerability is actively being exploited and anyone using Log4J should update to version 2.16.0 as soon as possible, even if you have previously updated to 2.15.0. The latest version can be found on the Log4J download page....
December 14, 2021 5:48 PM
Exploitation of Log4j CVE-2021-44228 before public disclosure and evolution of evasion and exfiltration
In this blog post we will cover WAF evasion patterns and exfiltration attempts seen in the wild, trend data on attempted exploitation, and information on exploitation that we saw prior to the public disclosure of CVE-2021-44228....
December 14, 2021 10:23 AM
Sanitizing Cloudflare Logs to protect customers from the Log4j vulnerability
Many Cloudflare customers consume their logs using software that uses Log4j, so we are mitigating any exploit attempts via Cloudflare Logs....
December 10, 2021 11:39 PM
How Cloudflare security responded to Log4j 2 vulnerability
Yesterday, December 9, 2021, when a serious vulnerability in the popular Java-based logging package log4j was publicly disclosed, our security teams jumped into action to help respond to the first question and answer the second question. This post explores the second....
December 10, 2021 9:06 PM
Actual CVE-2021-44228 payloads captured in the wild
I wrote earlier about how to mitigate CVE-2021-44228 in Log4j, how the vulnerability came about and Cloudflare’s mitigations for our customers. As I write we are rolling out protection for our FREE customers as well because of the vulnerability’s severity....
December 10, 2021 6:36 PM
Inside the Log4j2 vulnerability (CVE-2021-44228)
In this post we explain the history of this vulnerability, how it was introduced, how Cloudflare is protecting our clients. We will update later with actual attempted exploitation we are seeing blocked by our firewall service....
December 10, 2021 11:39 AM
CVE-2021-44228 - Log4j RCE 0-day mitigation
A zero-day exploit affecting the popular Apache Log4j utility (CVE-2021-44228) was made public on December 9, 2021 that results in remote code execution (RCE).
This vulnerability is actively being exploited and anyone using Log4j should update to version 2.15.0 as soon as possibl...