CVE-2019-18631: The Windows component of Centrify Authentication and Privilege Elevation Services 3.4.0, 3.4.1, 3.4.2, 3.4.3,

This month

HIGH 7.8DOWNGRADEDOWNGRADE

CVE-2019-18631 is a high-severity flaw (CVSS 7.8) affecting authentication service, privilege elevation service. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Windows component of Centrify Authentication and Privilege Elevation Services 3.4.0, 3.4.1, 3.4.2, 3.4.3, 3.5.0, 3.5.1 (18.8), 3.5.2 (18.11), and 3.6.0 (19.6) does not properly handle an unspecified exception during use of partially trusted assemblies to serialize input data, which allows attackers to execute arbitrary code inside the Centrify process via (1) a crafted application that makes a pipe connection to the process and sends maliciou

Why this priority

High severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.2% (top 32%)
CISA exploited list	No
Weakness	CWE-502
Published	2019-11-05
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: centrify

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2019-11-05 16:15 UTCPublished CVE record published
2026-06-17 02:25 UTCUpdated Record last modified

centrify authentication service DOWNGRADE

Affected: 3.4.0 · 3.4.1 · 3.4.2 · 3.4.3 · 3.5.0 · 3.5.1 · 3.5.2 · 3.6.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.4.0

1. Check installed version

apt-cache policy authentication-service || rpm -q authentication-service || authentication-service --version

2. No fixed release: DOWNGRADE to a release before 3.4.0 (Debian / Ubuntu)

apt-cache madison authentication-service sudo apt install authentication-service=<VERSION_BEFORE_3.4.0> sudo apt-mark hold authentication-service

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list authentication-service sudo dnf downgrade authentication-service-<VERSION_BEFORE_3.4.0> sudo dnf versionlock add authentication-service

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

centrify privilege elevation service DOWNGRADE

Affected: 3.4.0 · 3.4.1 · 3.4.2 · 3.4.3 · 3.5.0 · 3.5.1 · 3.5.2 · 3.6.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.4.0

1. Check installed version

apt-cache policy privilege-elevation-service || rpm -q privilege-elevation-service || privilege-elevation-service --version

2. No fixed release: DOWNGRADE to a release before 3.4.0 (Debian / Ubuntu)

apt-cache madison privilege-elevation-service sudo apt install privilege-elevation-service=<VERSION_BEFORE_3.4.0> sudo apt-mark hold privilege-elevation-service

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list privilege-elevation-service sudo dnf downgrade privilege-elevation-service-<VERSION_BEFORE_3.4.0> sudo dnf versionlock add privilege-elevation-service

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2019-18631?

authentication service: downgrade or apply the listed mitigation; privilege elevation service: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-18631 being exploited?

CVE-2019-18631 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2019-18631 affect?

CVE-2019-18631 affects authentication service, privilege elevation service. Severity is high (CVSS 7.8). The Windows component of Centrify Authentication and Privilege Elevation Services 3.4.0, 3.4.1, 3.4.2, 3.4.3, 3.5.0, 3.5.1 (18.8), 3.5.2 (18.11), and 3.6.0 (19.6) does not properly handle an unspecified exception during use of partially tru

How urgent is CVE-2019-18631?

Priority 44/100. High severity

Software pages

Windows vulnerabilities

References

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