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Date: Tue, 31 Oct 2023 23:26:12 +0200
From: Valtteri Vuorikoski <vuori@...com.org>
To: oss-security@...ts.openwall.com
Subject: CVE-2023-5631: XSS vulnerability in Roundcube webmail
Not associated with the project or ESET, but didn't see anything here about
this yet.
Roundcube is an open-source webmail client. Versions up to 1.6.4 are
vulnerable (including the 1.4.x and 1.5.x series) to an XSS exploit
caused by an issue in the sanitization of SVG image elements in HTML
emails. ESET describes CVE-2023-5631 as follows in their press release
at <https://www.eset.com/us/about/newsroom/press-releases/eset-research-winter-vivern-attacks-roundcube-webmail-servers-of-governments-in-europe-through-zero-1/>:
By sending a specially crafted email message, attackers are able to
load arbitrary JavaScript code in the context of the Roundcube user’s
browser window. No manual interaction other than viewing the message
in a web browser is required. The final JavaScript payload can
exfiltrate email messages to the command and control server of the
group.
The Roundcube project has released new versions for each of the abovementioned
release series. The official release notification is at
<https://roundcube.net/news/2023/10/16/security-update-1.6.4-released>.
According to ESET, the vulnerability is being actively exploited to
target "governmental entities in Europe".
-Valtteri
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