CVE-2018-17828

Exp

Directory traversal vulnerability in ZZIPlib 0.13.69 allows attackers to overwrite arbitrary files via a .. (dot dot) in a zip file, because of the function unzzip_cat in the bins/unzzipcat-mem.c file.

Published: 2018-10-01 Last update: 2025-07-10 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-17828 is rated High Exploit Risk (63.1/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.54%). 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +1.10% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

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

Public exploit references (Exploit-DB) for CVE-2018-17828

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2018-17828

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 0.43% 1.54% +1.10%
2 2026-05-26 0.55% 0.43% -0.11%
3 2026-04-13 — 0.55% —

Full EPSS history (12 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-17828

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.5 3.0 MEDIUM
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/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: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: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: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.
 1.8 3.6 [email protected]
5.8 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
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.
 8.6 4.9 [email protected]

Weakness enumeration for CVE-2018-17828

OS Trackers for CVE-2018-17828

vendor priority summary link
alpine — CVE-2018-17828: 1 source package rows (zziplib); 7 state rows across 7 repos (3.17-community, 3.18-community, 3.19-community, 3.20-community, 3.21-community, 3.22-community, edge-community); fixed 7, open 0. https://security.alpinelinux.org/vuln/CVE-2018-17828
debian unimportant CVE-2018-17828 unimportant priority: Debian including 1 source packages (zziplib), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): open 5. https://security-tracker.debian.org/tracker/CVE-2018-17828
redhat medium — https://access.redhat.com/security/cve/CVE-2018-17828
suse medium CVE-2018-17828 severity moderate: SUSE including 27 source package names (libzzip-0-13-0.13.67-10.14.1, libzzip-0-13-0.13.69-3.3.1, …), 57 product×package rows across 27 product lines (SUSE Liberty Linux 7, SUSE Liberty Linux 7 LTSS, … (27 product lines)): Fixed 57. https://www.suse.com/security/cve/CVE-2018-17828/
ubuntu negligible CVE-2018-17828 negligible priority: Ubuntu including 1 source packages (zziplib), 19 status rows across 19 suites (bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): ignored 11, needed 6, DNE 1, needs-triage 1. https://ubuntu.com/security/CVE-2018-17828

Affected software / configurations for CVE-2018-17828

Vendor Product Version Raw CPE
gdraheim zziplib 0.13.69 cpe:2.3:a:gdraheim:zziplib:0.13.69:*:*:*:*:*:*:*

References for CVE-2018-17828

URL Tags
https://github.com/gdraheim/zziplib/issues/62 Exploit Patch Third Party Advisory
cvelogic Threat Intelligence