CVE-2013-4235

shadow: TOCTOU (time-of-check time-of-use) race condition when copying and removing directory trees

Published: 2019-12-03 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2013-4235 is rated Low Risk (28.3/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.06%). 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-2013-4235

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 2024-11-26 0.05% 0.06% +0.01%
2 2023-03-07 0.95% 0.05% -0.90%
3 2022-02-04 — 0.95% —

Full EPSS history (3 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2013-4235

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.7 3.1 MEDIUM
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/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:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
 1.0 3.6 [email protected]
3.3 2.0 LOW
AV:L/AC:M/Au:N/C:N/I:P/A:P 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:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 3.4 4.9 [email protected]

Weakness enumeration for CVE-2013-4235

OS Trackers for CVE-2013-4235

vendor priority summary link
debian unimportant CVE-2013-4235 unimportant priority: Debian including 1 source packages (shadow), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 4, open 1. https://security-tracker.debian.org/tracker/CVE-2013-4235
gentoo normal CVE-2013-4235: 1 GLSA(s) (202210-26), 1 atom(s) (sys-apps/shadow); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2013-4235
redhat low — https://access.redhat.com/security/cve/CVE-2013-4235
suse medium CVE-2013-4235 severity moderate: SUSE including 433 source package names (0.0.17-1.1:login_defs-4.8.1-150600.17.6.1, 0.0.17-1.1:shadow-4.8.1-150600.17.6.1, …), 1059 product×package rows across 404 product lines (Container bci/bci-init, Container bci/bci-sle15-kernel-module-devel, … (404 product lines)): Fixed 854, Known Affected 205. https://www.suse.com/security/cve/CVE-2013-4235/
ubuntu low CVE-2013-4235 low priority: Ubuntu including 1 source packages (shadow), 27 status rows across 27 suites (artful, bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lucid, lunar, mantic, noble, oracular, plucky, precise, questing, trusty, upstream, utopic, vivid, wily, xenial, yakkety, zesty): ignored 14, not-affected 6, needed 4, released 3. https://ubuntu.com/security/CVE-2013-4235

Affected software / configurations for CVE-2013-4235

Vendor Product Version Raw CPE
debian shadow — cpe:2.3:a:debian:shadow:-:*:*:*:*:*:*:*
debian debian_linux 8.0 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
debian debian_linux 9.0 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
debian debian_linux 10.0 cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
fedoraproject fedora 16 cpe:2.3:o:fedoraproject:fedora:16:*:*:*:*:*:*:*
fedoraproject fedora 17 cpe:2.3:o:fedoraproject:fedora:17:*:*:*:*:*:*:*
redhat enterprise_linux 5 cpe:2.3:o:redhat:enterprise_linux:5:*:*:*:*:*:*:*
redhat enterprise_linux 6.0 cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*

References for CVE-2013-4235

cvelogic Threat Intelligence