CVE-2020-20412

Exp

lib/codebook.c in libvorbis before 1.3.6, as used in StepMania 5.0.12 and other products, has insufficient array bounds checking via a crafted OGG file. NOTE: this may overlap CVE-2018-5146.

Published: 2020-12-25 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-20412 is rated High Exploit Risk (62.3/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.03%). 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-2020-20412

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

Exploit prediction scoring system (EPSS) score for CVE-2020-20412

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% 1.03% +0.59%
2 2025-11-21 0.29% 0.43% +0.15%
3 2025-11-18 — 0.29% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-20412

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/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:N)
Doesn’t really leak secrets in a meaningful 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 3.6 [email protected]
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/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:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2020-20412

OS Trackers for CVE-2020-20412

vendor priority summary link
alpine medium CVE-2020-20412: 1 source package rows (libvorbis); 10 state rows across 5 repos (3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 0, open 10. https://security.alpinelinux.org/vuln/CVE-2020-20412
suse medium CVE-2020-20412 severity moderate: SUSE including 9 source package names (libvorbis, libvorbis-devel, …), 165 product×package rows across 33 product lines (SUSE CaaS Platform 4.0, SUSE Enterprise Storage 6, … (33 product lines)): Known Not Affected 165. https://www.suse.com/security/cve/CVE-2020-20412/

Affected software / configurations for CVE-2020-20412

Vendor Product Version Raw CPE
stepmania stepmania 5.0.12 cpe:2.3:a:stepmania:stepmania:5.0.12:-:*:*:*:*:*:*
xiph.org libvorbis >= 1.3.2, < 1.3.6 cpe:2.3:a:xiph.org:libvorbis:*:*:*:*:*:*:*:*

References for CVE-2020-20412

URL Tags
https://github.com/stepmania/stepmania/issues/1890 Exploit Patch Third Party Advisory
cvelogic Threat Intelligence