Vulnerability Details : CVE-2021-27899
The Proofpoint Insider Threat Management Agents (formerly ObserveIT Agent) for MacOS and Linux perform improper validation of the ITM Server's certificate, which enables a remote attacker to intercept and alter these communications using a man-in-the-middle attack. All versions before 7.11.1 are affected. Agents for Windows and Cloud are not affected.
Products affected by CVE-2021-27899
- Proofpoint » Insider Threat Management » For LinuxVersions from including (>=) 7.9.0 and before (<) 7.9.3cpe:2.3:a:proofpoint:insider_threat_management:*:*:*:*:*:linux:*:*
- Proofpoint » Insider Threat Management » For LinuxVersions from including (>=) 7.11.0 and before (<) 7.11.1cpe:2.3:a:proofpoint:insider_threat_management:*:*:*:*:*:linux:*:*
- Proofpoint » Insider Threat Management » For MacosVersions from including (>=) 7.10.0 and before (<) 7.10.3cpe:2.3:a:proofpoint:insider_threat_management:*:*:*:*:*:macos:*:*
- Proofpoint » Insider Threat Management » For LinuxVersions from including (>=) 7.10.0 and before (<) 7.10.3cpe:2.3:a:proofpoint:insider_threat_management:*:*:*:*:*:linux:*:*
- Proofpoint » Insider Threat Management » For MacosVersions from including (>=) 7.9.0 and before (<) 7.9.3cpe:2.3:a:proofpoint:insider_threat_management:*:*:*:*:*:macos:*:*
- Proofpoint » Insider Threat Management » For MacosVersions from including (>=) 7.11.0 and before (<) 7.11.1cpe:2.3:a:proofpoint:insider_threat_management:*:*:*:*:*:macos:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-27899
0.19%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 56 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-27899
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.8
|
MEDIUM | AV:N/AC:M/Au:N/C:P/I:P/A:N |
8.6
|
4.9
|
NIST | |
|
7.4
|
HIGH | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
2.2
|
5.2
|
NIST |
CWE ids for CVE-2021-27899
-
The product does not validate, or incorrectly validates, a certificate.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-27899
-
https://www.proofpoint.com/us/security/security-advisories/pfpt-sa-2021-0004
Security Advisories | Proofpoint USVendor Advisory
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