CVE-2016-6338: ovirt-engine-webadmin, as used in Red Hat Enterprise Virtualization Manager (aka RHEV-M) for Servers and RHEV-

This month

MEDIUM 6.8WATCHLISTDOWNGRADE

CVE-2016-6338 is a medium-severity flaw (CVSS 6.8) affecting enterprise virtualization. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

ovirt-engine-webadmin, as used in Red Hat Enterprise Virtualization Manager (aka RHEV-M) for Servers and RHEV-M 4.0, allows physically proximate attackers to bypass a webadmin session timeout restriction via vectors related to UI selections, which trigger repeating queries.

Why this priority

Public exploit reference
On your watchlist

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

Risk facts

CVSS score	6.8 (Medium)
Attack vector	Physical
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 56%)
CISA exploited list	No
Weakness	CWE-284
Published	2017-04-20
Last modified	2026-06-17

Publisher (CNA): Red Hat, Inc. · Vendor: redhat

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

Am I affected?

Timeline

2017-04-20 17:59 UTCPublished CVE record published
2026-06-17 00:50 UTCUpdated Record last modified

redhat enterprise virtualization DOWNGRADE

Affected: 4.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.0

1. Check installed version

apt-cache policy enterprise-virtualization || rpm -q enterprise-virtualization || enterprise-virtualization --version

2. No fixed release: DOWNGRADE to a release before 4.0 (Debian / Ubuntu)

apt-cache madison enterprise-virtualization sudo apt install enterprise-virtualization=<VERSION_BEFORE_4.0> sudo apt-mark hold enterprise-virtualization

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

dnf --showduplicates list enterprise-virtualization sudo dnf downgrade enterprise-virtualization-<VERSION_BEFORE_4.0> sudo dnf versionlock add enterprise-virtualization

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-2016-6338?

enterprise virtualization: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2016-6338 being exploited?

CVE-2016-6338 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-2016-6338 affect?

CVE-2016-6338 affects enterprise virtualization. Severity is medium (CVSS 6.8). ovirt-engine-webadmin, as used in Red Hat Enterprise Virtualization Manager (aka RHEV-M) for Servers and RHEV-M 4.0, allows physically proximate attackers to bypass a webadmin session timeout restriction via vectors related to UI selections

How urgent is CVE-2016-6338?

Priority 45/100. Public exploit reference; On your watchlist

Related CVEs

CVE-2018-1117 MEDIUM 5.0 UPGRADE MITIGATE ovirt-ansible-roles before version 1.0.6 has a vulnerability due to a missing no_log directive, resulting in t
CVE-2018-1111 HIGH 7.5 MITIGATE DOWNGRADE DHCP packages in Red Hat Enterprise Linux 6 and 7, Fedora 28, and earlier are vulnerable to a command injectio
CVE-2018-1074 HIGH 7.7 UPGRADE DOWNGRADE ovirt-engine API and administration web portal before versions 4.2.2.5, 4.1.11.2 is vulnerable to an exposure
CVE-2017-2614 MEDIUM 6.8 DOWNGRADE When updating a password in the rhvm database the ovirt-aaa-jdbc-tool tools before 1.1.3 fail to correctly che
CVE-2016-6310 MEDIUM 5.5 UPGRADE oVirt Engine discloses the ENGINE_HTTPS_PKI_TRUST_STORE_PASSWORD in /var/log/ovirt-engine/engine.log file in R

References

← Back to latest CVEs