CVE-2020-18831

Exp

Buffer Overflow vulnerability in tEXtToDataBuf function in pngimage.cpp in Exiv2 0.27.1 allows remote attackers to cause a denial of service and other unspecified impacts via use of crafted file.

Published: 2023-08-22 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-18831 is rated High Exploit Risk (72.9/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.91%). 1 public exploit reference(s) are indexed (Exploit-DB). 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-2020-18831

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

Exploit prediction scoring system (EPSS) score for CVE-2020-18831

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 2026-05-17 0.80% 0.91% +0.11%
2 2026-01-23 0.56% 0.80% +0.24%
3 2025-11-21 — 0.56% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-18831

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H 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: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.
 1.8 5.9 [email protected]

Weakness enumeration for CVE-2020-18831

OS Trackers for CVE-2020-18831

vendor priority summary link
debian not yet assigned CVE-2020-18831 not yet assigned priority: Debian including 1 source packages (exiv2), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2020-18831
suse medium CVE-2020-18831 severity moderate: SUSE including 7 source package names (exiv2, libexiv2-12, …), 30 product×package rows across 15 product lines (SUSE Linux Enterprise High Performance Computing 12 SP5, SUSE Linux Enterprise Module for Desktop Applications 15 SP4, … (15 product lines)): Known Not Affected 28, Fixed 2. https://www.suse.com/security/cve/CVE-2020-18831/
ubuntu medium CVE-2020-18831 medium priority: Ubuntu including 1 source packages (exiv2), 12 status rows across 12 suites (bionic, focal, jammy, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): not-affected 10, ignored 1, released 1. https://ubuntu.com/security/CVE-2020-18831

Affected software / configurations for CVE-2020-18831

Vendor Product Version Raw CPE
exiv2 exiv2 0.27.1 cpe:2.3:a:exiv2:exiv2:0.27.1:*:*:*:*:*:*:*

References for CVE-2020-18831

URL Tags
https://github.com/Exiv2/exiv2/issues/828 Exploit Issue Tracking Patch Vendor Advisory
https://www.exiv2.org/download.html Broken Link
cvelogic Threat Intelligence