Citrix Content Collaboration ShareFile Improper Access Control Vulnerability

A vulnerability has been discovered in the customer-managed ShareFile storage zones controller which, if exploited, could allow an unauthenticated attacker to remotely compromise the customer-managed ShareFile storage zones controller.

CheckOps priority index

9.2/10 Patch within 24 h

Severity9.8

Probability9.7

Exploitation4/5

Severity = CVSS. Probability = EPSS (FIRST). Exploitation = public signals: KEV, EUVD, ransomware, EPSS above 10 %, no account required.

EPSS · today 97.3% higher than 99.9% of CVEs

CVSS 3.1 9.8 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:

Exploited for 1,175 days 16 Aug 2023

CISA due date 06 Sept 2023 for US federal agencies

Exploitation probability EPSS · FIRST

EPSS probability (%)Percentile among all CVEs

Exploitation signals 4 / 5

KEV catalog (CISA)16 Aug 2023
Exploited in EUVD (ENISA)16 Aug 2023
Used by ransomwareno
EPSS above 10 %97.3%
No account, over the networkyes

What to do

Fix

Apply the vendor’s fix as soon as it is available.

CISA guidance: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Meanwhile

Take the service off the internet or restrict access to it, watch the logs and look for signs of compromise.

Manufacturers (CRA)

Exploited vulnerability in your product: early warning to ENISA within 24 h, then notification within 72 h (Article 14 of the Cyber Resilience Act). The CRA explained

Affected products

Citrix ShareFile Storage Zones ControllerContent Collaboration

Affected versions

0 <5.11.24

Weaknesses (CWE)

CWE-284

Open source packages OSV

Affected libraries according to OSV, with fixed versions.

Timeline

10 Jul 2023
Published
16 Aug 2023
Exploitation reported (ENISA)
16 Aug 2023
Added to the KEV catalog
06 Sept 2023
CISA remediation due date
26 Sept 2026
EPSS peak: 97.3%

References

Other exploited vulnerabilities from the same vendor

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