DEBIAN-CVE-2025-54489

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Source
https://security-tracker.debian.org/tracker/CVE-2025-54489
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-54489.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2025-54489
Upstream
Published
2025-08-25T14:15:35.233Z
Modified
2026-05-01T06:02:07.191229Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

A stack-based buffer overflow vulnerability exists in the MFER parsing functionality of The Biosig Project libbiosig 3.9.0 and Master Branch (35a819fa). A specially crafted MFER file can lead to arbitrary code execution. An attacker can provide a malicious file to trigger this vulnerability.This vulnerability manifests on line 8970 of biosig.c on the current master branch (35a819fa), when the Tag is 63:

             else if (tag==63) {
                 uint8_t tag2=255, len2=255;

                 count = 0;
                 while ((count<len) && !(FlagInfiniteLength && len2==0 && tag2==0)){
                     curPos += ifread(&tag2,1,1,hdr);
                     curPos += ifread(&len2,1,1,hdr);
                     if (VERBOSE_LEVEL==9)
                         fprintf(stdout,"MFER: tag=%3i chan=%2i len=%-4i tag2=%3i len2=%3i curPos=%i %li count=%4i\n",tag,chan,len,tag2,len2,curPos,iftell(hdr),(int)count);

                     if (FlagInfiniteLength && len2==0 && tag2==0) break;

                     count  += (2+len2);
                     curPos += ifread(&buf,1,len2,hdr);

Here, the number of bytes read is not the Data Length decoded from the current frame in the file (len) but rather is a new length contained in a single octet read from the same input file (len2). Despite this, a stack-based buffer overflow condition can still occur, as the destination buffer is still buf, which has a size of only 128 bytes, while len2 can be as large as 255.

References

Affected packages

Debian:11 / biosig

Package

Name
biosig
Purl
pkg:deb/debian/biosig?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.1.2-4
2.3.3-1
2.4.0-1
2.4.0-2
2.5.0-1
2.5.2-1
2.5.2-2
2.6.0-1
2.6.1-1
3.*
3.9.0-1
3.9.5-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-54489.json"

Debian:12 / biosig

Package

Name
biosig
Purl
pkg:deb/debian/biosig?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.5.0-1
2.5.2-1
2.5.2-2
2.6.0-1
2.6.1-1
3.*
3.9.0-1
3.9.5-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-54489.json"

Debian:13 / biosig

Package

Name
biosig
Purl
pkg:deb/debian/biosig?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.9.0-1
3.9.5-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-54489.json"

Debian:14 / biosig

Package

Name
biosig
Purl
pkg:deb/debian/biosig?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.9.5-1

Affected versions

3.*
3.9.0-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-54489.json"