CVE-2017-13649

Name: CVE-2017-13649
Creator: NVD / NIST
Published: 2017-08-23T21:29:00.28+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.28%

Last modified Jun 17, 2026

CVE-2017-13649 is a vulnerability of currently unknown severity. UnrealIRCd 4.0.13 and earlier creates a 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 PID file modification before a root script executes a "kill `cat /pathname`" command. NOTE: the vendor indicates that there is no common or recommended scenario in which a root script would execute this kill command.. EPSS estimates a 0.28% chance of exploitation in the next 30 days.

Description

UnrealIRCd 4.0.13 and earlier creates a 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 PID file modification before a root script executes a "kill `cat /pathname`" command. NOTE: the vendor indicates that there is no common or recommended scenario in which a root script would execute this kill command.

Metrics

EPSS Probability

0.28%

20.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-665

Affected Software

Vendor	Product	Versions
Unrealircd	Unrealircd	<= 4.0.13

References

http://www.securityfocus.com/bid/100507Third Party Advisory, VDB Entry
https://bugs.unrealircd.org/view.php?id=4990Issue Tracking, Third Party Advisory
http://www.securityfocus.com/bid/100507Third Party Advisory, VDB Entry
https://bugs.unrealircd.org/view.php?id=4990Issue Tracking, Third Party Advisory

Timeline

Published: Aug 23, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-13649?

How severe is CVE-2017-13649?

Severity scoring for CVE-2017-13649 is pending analysis. The EPSS model estimates a 0.28% probability of exploitation in the next 30 days.

How do I fix CVE-2017-13649?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-13649?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST