CVE-2017-1000199: tcmu-runner version 0.91 up to 1.20 is vulnerable to information disclosure in handler_qcow.so resulting in no

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HIGH 7.5REMOTEDOWNGRADE

CVE-2017-1000199 is a high-severity flaw (CVSS 7.5) affecting tcmu-runner. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

tcmu-runner version 0.91 up to 1.20 is vulnerable to information disclosure in handler_qcow.so resulting in non-privileged users being able to check for existence of any file with root privileges.

Why this priority

High severity
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.5% (top 26%)
CISA exploited list	No
Weakness	CWE-200
Published	2017-11-17
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: tcmu-runner project

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

Am I affected?

Timeline

2017-11-17 02:29 UTCPublished CVE record published
2026-06-17 00:58 UTCUpdated Record last modified

tcmu-runner project tcmu-runner DOWNGRADE

Affected: 0.9.1 · 0.9.2 · 0.9.3 · 0.9.4 · 1.0.5 · 1.1.0 · 1.1.1 · 1.1.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.9.1

1. Check installed version

apt-cache policy tcmu-runner || rpm -q tcmu-runner || tcmu-runner --version

2. No fixed release: DOWNGRADE to a release before 0.9.1 (Debian / Ubuntu)

apt-cache madison tcmu-runner sudo apt install tcmu-runner=<VERSION_BEFORE_0.9.1> sudo apt-mark hold tcmu-runner

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

dnf --showduplicates list tcmu-runner sudo dnf downgrade tcmu-runner-<VERSION_BEFORE_0.9.1> sudo dnf versionlock add tcmu-runner

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-2017-1000199?

tcmu-runner: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2017-1000199 being exploited?

CVE-2017-1000199 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-2017-1000199 affect?

CVE-2017-1000199 affects tcmu-runner. Severity is high (CVSS 7.5). tcmu-runner version 0.91 up to 1.20 is vulnerable to information disclosure in handler_qcow.so resulting in non-privileged users being able to check for existence of any file with root privileges.

How urgent is CVE-2017-1000199?

Priority 50/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2021-3139 HIGH 8.1 UPGRADE In Open-iSCSI tcmu-runner 1.3.x, 1.4.x, and 1.5.x through 1.5.2, xcopy_locate_udev in tcmur_cmd_handler.c lack
CVE-2017-1000201 MEDIUM 5.5 DOWNGRADE The tcmu-runner daemon in tcmu-runner version 1.0.5 to 1.2.0 is vulnerable to a local denial of service attack
CVE-2017-1000200 HIGH 7.5 DOWNGRADE tcmu-runner version 1.0.5 to 1.2.0 is vulnerable to a dbus triggered NULL pointer dereference in the tcmu-runn
CVE-2017-1000198 HIGH 7.5 DOWNGRADE tcmu-runner daemon version 0.9.0 to 1.2.0 is vulnerable to invalid memory references in the handler_glfs.so ha

References

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