CVE-2020-18771

Exp

Exiv2 0.27.99.0 has a global buffer over-read in Exiv2::Internal::Nikon1MakerNote::print0x0088 in nikonmn_int.cpp which can result in an information leak.

Published: 2021-08-23 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-18771 is rated High Exploit Risk (62.5/100): CVSS High severity, with low exploitation likelihood (EPSS 0.22%). 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-2020-18771

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

Exploit prediction scoring system (EPSS) score for CVE-2020-18771

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 2025-11-21 0.80% 0.22% -0.58%
2 2025-11-18 0.21% 0.80% +0.60%
3 2025-07-12 — 0.21% —

Full EPSS history (15 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-18771

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.1 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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: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: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.
 2.8 5.2 [email protected]
5.8 2.0 MEDIUM
AV:N/AC:M/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:M)
Exploitation needs some favorable conditions, but not exceptional ones.
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.
 8.6 4.9 [email protected]

Weakness enumeration for CVE-2020-18771

OS Trackers for CVE-2020-18771

vendor priority summary link
debian not yet assigned CVE-2020-18771 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-2020-18771
gentoo high CVE-2020-18771: 1 GLSA(s) (202312-06), 1 atom(s) (media-gfx/exiv2); latest impact high. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2020-18771
redhat low — https://access.redhat.com/security/cve/CVE-2020-18771
ubuntu low CVE-2020-18771 low priority: Ubuntu including 1 source packages (exiv2), 15 status rows across 15 suites (bionic, focal, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): not-affected 11, released 3, DNE 1. https://ubuntu.com/security/CVE-2020-18771

Affected software / configurations for CVE-2020-18771

Vendor Product Version Raw CPE
exiv2 exiv2 0.27.99.0 cpe:2.3:a:exiv2:exiv2:0.27.99.0:*:*:*:*:*:*:*
debian debian_linux 10.0 cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

References for CVE-2020-18771

URL Tags
https://cwe.mitre.org/data/definitions/126.html Technical Description Third Party Advisory
https://github.com/Exiv2/exiv2/issues/756 Exploit Issue Tracking Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/01/msg00004.html Mailing List Third Party Advisory
https://security.gentoo.org/glsa/202312-06
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