DEBIAN-CVE-2021-33912

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Source
https://security-tracker.debian.org/tracker/CVE-2021-33912
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-33912.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2021-33912
Upstream
Published
2022-01-19T18:15:07Z
Modified
2025-09-30T05:15:05.913204Z
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

libspf2 before 1.2.11 has a four-byte heap-based buffer overflow that might allow remote attackers to execute arbitrary code (via an unauthenticated e-mail message from anywhere on the Internet) with a crafted SPF DNS record, because of incorrect sprintf usage in SPFrecordexpanddata in spfexpand.c. The vulnerable code may be part of the supply chain of a site's e-mail infrastructure (e.g., with additional configuration, Exim can use libspf2; the Postfix web site links to unofficial patches for use of libspf2 with Postfix; older versions of spfquery relied on libspf2) but most often is not.

References

Affected packages

Debian:11 / libspf2

Package

Name
libspf2
Purl
pkg:deb/debian/libspf2?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.2.10-7.1~deb11u1

Affected versions

1.*

1.2.10-7
1.2.10-7.1~deb10u1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:12 / libspf2

Package

Name
libspf2
Purl
pkg:deb/debian/libspf2?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.2.10-7.1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:13 / libspf2

Package

Name
libspf2
Purl
pkg:deb/debian/libspf2?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.2.10-7.1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:14 / libspf2

Package

Name
libspf2
Purl
pkg:deb/debian/libspf2?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.2.10-7.1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}