CVE-2013-4392

systemd, when updating file permissions, allows local users to change the permissions and SELinux security contexts for arbitrary files via a symlink attack on unspecified files.

Published: 2013-10-28 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2013-4392 is rated Low Risk (33.4/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.47%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2013-4392

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.04% 0.47% +0.43%
2 2026-01-21 0.14% 0.04% -0.10%
3 2025-03-17 — 0.14% —

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2013-4392

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 3.1 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 1.3 3.6 134c704f-9b21-4f2e-91b3-4a467353bcc0
3.3 2.0 LOW
AV:L/AC:M/Au:N/C:P/I:P/A:N Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 3.4 4.9 [email protected]

Weakness enumeration for CVE-2013-4392

OS Trackers for CVE-2013-4392

vendor priority summary link
debian unimportant CVE-2013-4392 unimportant priority: Debian including 1 source packages (systemd), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): open 5. https://security-tracker.debian.org/tracker/CVE-2013-4392
redhat medium — https://access.redhat.com/security/cve/CVE-2013-4392
ubuntu low CVE-2013-4392 low priority: Ubuntu including 1 source packages (systemd), 5 status rows across 5 suites (lucid, precise, quantal, raring, upstream): DNE 3, not-affected 1, released 1. https://ubuntu.com/security/CVE-2013-4392

Affected software / configurations for CVE-2013-4392

Vendor Product Version Raw CPE
systemd_project systemd < 239 cpe:2.3:a:systemd_project:systemd:*:*:*:*:*:*:*:*

References for CVE-2013-4392

URL Tags
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=725357 Issue Tracking Third Party Advisory
http://www.openwall.com/lists/oss-security/2013/10/01/9 Mailing List Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=859060 Issue Tracking Third Party Advisory
cvelogic Threat Intelligence