CVE-2017-13649
UnrealIRCd 4.0.13 and earlier creates a PID file after dropping privileges to a non-root account,...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2017-13649- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 2.1 Low
AV:L/AC:L/Au:N/C:N/I:N/A:P - Weakness
- CWE-665
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2017-13649- Updated
- 2026-11-02
EUVDEUVD-2017-5166 No score
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.
- Record
EUVD-2017-5166- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-p387-c589-x473
UnrealIRCd 4.0.13 and earlier creates a PID file after dropping privileges to a non-root account,...
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.
- Record
GHSA-p387-c589-x473- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-665
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2017-13649 is a medium vulnerability (CVSS 5.5) in Unrealircd, published August 23, 2017. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.28%, the 21st percentile. No source names a fixed version.