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ZIMBRA FIXED ACTIVELY EXPLOITED ZERO-DAY CVE-2023-38750 IN ZCS

July 27, 2023  By Pierluigi Paganini




ZIMBRA ADDRESSED A ZERO-DAY VULNERABILITY EXPLOITED IN ATTACKS AIMED AT ZIMBRA
COLLABORATION SUITE (ZCS) EMAIL SERVERS.

Two weeks ago Zimbra urged customers to manually install updates to fix a
zero-day vulnerability, now tracked as CVE-2023-38750, that is actively
exploited in attacks against Zimbra Collaboration Suite (ZCS) email servers.

Zimbra Collaboration Suite is a comprehensive open-source messaging and
collaboration platform that provides email, calendaring, file sharing, and other
collaboration tools. It was developed by Zimbra, Inc


00:00/00:00


The vulnerability is reflected Cross-Site Scripting (XSS) that was discovered by
Clément Lecigne of Google Threat Analysis Group (TAG). Google TAG researchers
focus on identifying and countering advanced and persistent threats. The primary
task of the Google TAG is to investigate and mitigate targeted and sophisticated
cyber threats, including state-sponsored hacking and hacking groups involved in
coordinated attacks.

Almost any vulnerability reported by Google TAG in the past was part of exploits
used by APT groups in targeted attacks. The popular security researcher Maddie
Stone from Google TAG confirmed that this issue was used by an APT group too.

Zimbra this week released version ZCS 10.0.2 which also addressed the
vulnerability.

“The release includes security fixes for a bug that could lead to exposure of
internal JSP and XML files has been fixed” reads the advisory.

CISA added the vulnerability to its Known Exploited Vulnerabilities Catalog and
ordered federal agencies to fix this flaw by August 17, 2023.

“These types of vulnerabilities are frequent attack vectors for malicious cyber
actors and pose significant risks to the federal enterprise.” reads the CISA’s
announcement. 

According to Binding Operational Directive (BOD) 22-01: Reducing the Significant
Risk of Known Exploited Vulnerabilities, FCEB agencies have to address the
identified vulnerabilities by the due date to protect their networks against
attacks exploiting the flaws in the catalog.

Experts recommend also private organizations review the Catalog and address the
vulnerabilities in their infrastructure.

Follow me on Twitter: @securityaffairs Facebook and Mastodon

Pierluigi Paganini

(SecurityAffairs – hacking, Zimbra)




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PIERLUIGI PAGANINI

Pierluigi Paganini is member of the ENISA (European Union Agency for Network and
Information Security) Threat Landscape Stakeholder Group and Cyber G7 Group, he
is also a Security Evangelist, Security Analyst and Freelance Writer.
Editor-in-Chief at "Cyber Defense Magazine", Pierluigi is a cyber security
expert with over 20 years experience in the field, he is Certified Ethical
Hacker at EC Council in London. The passion for writing and a strong belief that
security is founded on sharing and awareness led Pierluigi to find the security
blog "Security Affairs" recently named a Top National Security Resource for US.
Pierluigi is a member of the "The Hacker News" team and he is a writer for some
major publications in the field such as Cyber War Zone, ICTTF, Infosec Island,
Infosec Institute, The Hacker News Magazine and for many other Security
magazines. Author of the Books "The Deep Dark Web" and “Digital Virtual Currency
and Bitcoin”.




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DEPOSITFILES EXPOSED CONFIG FILE, JEOPARDIZING USER SECURITY

DepositFiles, a popular web hosting service, left its environment configuration
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