HOMEVULNERABILITIESCVE-2020-23904
MEDIUM

CVE-2020-23904

CWE-787Published: November 10, 2021· Updated: Jun 17, 2026

5.5
CVSS v3.1

Official Description

A stack buffer overflow in speexenc.c of Speex v1.2 allows attackers to cause a denial of service (DoS) via a crafted WAV file. NOTE: the vendor states "I cannot reproduce it" and it "is a demo program.

NVD Source

Technical Analysis

CVE-2020-23904 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.5.

From a weakness classification perspective (CWE-787): Out-of-bounds write vulnerabilities can lead to data corruption, crashes, or arbitrary code execution.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.None
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected Vendors & Products

xiph1 product(s)
speex
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://github.com/xiph/speex/issues/14
ADVISORYhttps://github.com/xiph/speex/issues/14

All References (2)

→
https://github.com/xiph/speex/issues/14Exploit · Issue Tracking · Third Party Advisory
→
https://github.com/xiph/speex/issues/14Exploit · Issue Tracking · Third Party Advisory

Quick Facts

CVE IDCVE-2020-23904
CVSS Score5.5 / 10
SeverityMEDIUM
WeaknessCWE-787
CISA KEVNo
Affected1 vendor(s)
PublishedNov 10, 2021

Related CVEs (CWE-787)

CVE-2013-5610
10.0
CVE-2015-5098
10.0
CVE-2026-4746
10.0
CVE-2011-1807
10.0
CVE-2015-5096
10.0
CVE-2018-6692
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-23904 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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