[BreachExchange] Recently Patched Confluence Vulnerability Exploited in the Wild

[Sophia Kingsbury]

https://www.securityweek.com/recently-patched-confluence-vulnerability-exploited-wild

Atlassian informed customers on August 25 that Confluence is affected by a
critical vulnerability — described as an OGNL injection issue — that can
allow remote attackers to execute arbitrary code on impacted Confluence
Server and Data Center instances.

The flaw, tracked as CVE-2021-26084, can in some cases be exploited without
authentication. Patches are included in versions 6.13.23, 7.4.11, 7.11.6,
7.12.5 and 7.13.0.

On August 29, researchers said it was easier than expected to reproduce the
exploit. On September 1, cybersecurity companies started seeing internet
scans aimed at identifying vulnerable systems, as well as exploitation
attempts.

Threat intelligence company Bad Packets has observed attacks exploiting
CVE-2021-26084 to deliver cryptocurrency miners.

After the first in-the-wild exploitation attempts were spotted, researchers
released a technical analysis of the vulnerability and proof-of-concept
(PoC) exploit code, which will likely lead to even more threat groups
adding the Confluence vulnerability to their arsenal.

Government cybersecurity agencies started issuing alerts for CVE-2021-26084
after the first exploitation attempts were observed.

Both profit-driven cybercriminals and state-sponsored threat actors have
been known to target vulnerabilities in Atlassian products.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.riskbasedsecurity.com/pipermail/breachexchange/attachments/20210902/c14d1621/attachment.html>