CVE-2017-5209

The base64decode function in base64.c in libimobiledevice libplist through 1.12 allows attackers to obtain sensitive information from process memory or cause a denial of service (buffer over-read) via split encoded Apple Property List data.

Published: 2017-01-11 Last update: 2026-05-06 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2017-5209 is rated High Risk (68.7/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 2.85%). EPSS rose +2.65% 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-2017-5209

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 0.20% 2.85% +2.65%
2 2026-05-08 0.41% 0.20% -0.20%
3 2025-03-30 — 0.41% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2017-5209

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.1 3.0 CRITICAL
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.2 [email protected]
6.4 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/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:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 4.9 [email protected]

Weakness enumeration for CVE-2017-5209

OS Trackers for CVE-2017-5209

vendor priority summary link
debian low CVE-2017-5209 low priority: Debian including 1 source packages (libplist), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2017-5209
redhat low — https://access.redhat.com/security/cve/CVE-2017-5209
suse medium CVE-2017-5209 severity moderate: SUSE including 30 source package names (libplist++-2_0-3-2.2.0-1.6, libplist++-2_0-3-32bit-2.2.0-1.6, …), 92 product×package rows across 38 product lines (SUSE Linux Enterprise Desktop 12 SP1, SUSE Linux Enterprise Desktop 12 SP2, … (38 product lines)): Fixed 92. https://www.suse.com/security/cve/CVE-2017-5209/
ubuntu negligible CVE-2017-5209 negligible priority: Ubuntu including 1 source packages (libplist), 23 status rows across 23 suites (artful, bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, precise, questing, trusty, upstream, xenial, yakkety, zesty): not-affected 17, ignored 3, DNE 1, needed 1, released 1. https://ubuntu.com/security/CVE-2017-5209

Affected software / configurations for CVE-2017-5209

Vendor Product Version Raw CPE
libimobiledevice libplist <= 1.12 cpe:2.3:a:libimobiledevice:libplist:*:*:*:*:*:*:*:*

References for CVE-2017-5209

cvelogic Threat Intelligence