CVE-2017-11746: Tenshi 0.15 creates a tenshi.pid file after dropping privileges to a non-root account, which might allow local

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HIGH 7.5REMOTEDOWNGRADE

CVE-2017-11746 is a high-severity flaw (CVSS 7.5) affecting tenshi. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Tenshi 0.15 creates a tenshi.pid file after dropping privileges to a non-root account, which might allow local users to kill arbitrary processes by leveraging access to this non-root account for tenshi.pid modification before a root script executes a "kill `cat /pathname/tenshi.pid`" command.

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	1.1% (top 35%)
CISA exploited list	No
Weakness	CWE-552
Published	2017-07-30
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: inversepath

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

Am I affected?

Timeline

2017-07-30 16:29 UTCPublished CVE record published
2026-06-17 01:02 UTCUpdated Record last modified

inversepath tenshi DOWNGRADE

Affected: 0.15

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.15

1. Check installed version

apt-cache policy tenshi || rpm -q tenshi || tenshi --version

2. No fixed release: DOWNGRADE to a release before 0.15 (Debian / Ubuntu)

apt-cache madison tenshi sudo apt install tenshi=<VERSION_BEFORE_0.15> sudo apt-mark hold tenshi

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

dnf --showduplicates list tenshi sudo dnf downgrade tenshi-<VERSION_BEFORE_0.15> sudo dnf versionlock add tenshi

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-2017-11746?

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

Is CVE-2017-11746 being exploited?

CVE-2017-11746 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-2017-11746 affect?

CVE-2017-11746 affects tenshi. Severity is high (CVSS 7.5). Tenshi 0.15 creates a tenshi.pid file after dropping privileges to a non-root account, which might allow local users to kill arbitrary processes by leveraging access to this non-root account for tenshi.pid modification before a root script

How urgent is CVE-2017-11746?

Priority 48/100. High severity; Remotely exploitable, no login, no user action

References

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