CVE-2017-12858

Double free vulnerability in the _zip_dirent_read function in zip_dirent.c in libzip allows attackers to have unspecified impact via unknown vectors.

Published: 2017-08-23 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2017-12858 is rated High Risk (73.1/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 3.70%). EPSS rose +2.96% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize remediation.

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-2017-12858

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 0.75% 3.70% +2.96%
2 2026-06-10 0.96% 0.75% -0.22%
3 2026-04-05 — 0.96% —

Full EPSS history (48 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2017-12858

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
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:N)
No account or special rights needed—anonymous or random user is enough.
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:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2017-12858

OS Trackers for CVE-2017-12858

vendor priority summary link
debian unimportant CVE-2017-12858 unimportant priority: Debian including 1 source packages (libzip), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2017-12858
redhat low — https://access.redhat.com/security/cve/CVE-2017-12858
suse medium CVE-2017-12858 severity moderate: SUSE including 19 source package names (libzip, libzip-devel, …), 81 product×package rows across 37 product lines (SUSE CaaS Platform 4.0, SUSE Enterprise Storage 6, … (37 product lines)): Known Not Affected 54, Fixed 27. https://www.suse.com/security/cve/CVE-2017-12858/
ubuntu medium CVE-2017-12858 medium priority: Ubuntu including 1 source packages (libzip), 4 status rows across 4 suites (trusty, upstream, xenial, zesty): not-affected 3, released 1. https://ubuntu.com/security/CVE-2017-12858

Affected software / configurations for CVE-2017-12858

Vendor Product Version Raw CPE
libzip libzip 1.2.0 cpe:2.3:a:libzip:libzip:1.2.0:*:*:*:*:*:*:*

References for CVE-2017-12858

cvelogic Threat Intelligence