What’s Vulnerable › Vulnerabilities

CVE-2017-13649

• Severity: medium (CVSS 5.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-08-23 · updated 2026-06-17
• Weakness: CWE-665

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.

Affected products

• UnrealIRCd: through 4.0.13

References

• http://www.securityfocus.com/bid/100507
• https://bugs.unrealircd.org/view.php?id=4990
• http://www.securityfocus.com/bid/100507
• https://bugs.unrealircd.org/view.php?id=4990

Get alerted when CVE-2017-13649 or the next vulnerability affects your stack