What is CVE-2021-34992?

CVE-2021-34992 is a high-severity vulnerability in Orckestra C1 Cms, classified under Deserialization of Untrusted Data. CVSS score: 8.8/10. Published 2021-11-15.

How severe is CVE-2021-34992?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2021-34992 known to be exploited?

4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Deserialization in Orckestra C1 Cms

CVE-2021-34992

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Orckestra C1 CMS 6.10. Authentication is required to exploit this vulnerability. The specific flaw exists within Composite.dll. The issue results from the lack of proper validation of user-supplied data, which can result in deserialization of untrusted data. An attacker can leverage this vulnerability to execute code in the context of the service account. Was ZDI-CAN-14740.

Vulnerability class: Insecure Deserialization

EPSS: 0.041 (89.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Orckestra C1 Cms — versions 6.10
Orckestra C1_cms — versions 6.10

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

Public proof-of-concept exploits

References

zdi-disclosures@trendmicro.com (VDB Entry, Third Party Advisory, x_refsource_MISC)
zdi-disclosures@trendmicro.com (Patch, Third Party Advisory, x_refsource_MISC, Release Notes)

Frequently asked questions

What is CVE-2021-34992?: CVE-2021-34992 is a high-severity vulnerability in Orckestra C1 Cms, classified under Deserialization of Untrusted Data. CVSS score: 8.8/10. Published 2021-11-15.
How severe is CVE-2021-34992?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2021-34992 known to be exploited?: 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.