DEBIAN-CVE-2021-33912
- 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
- Downstream
- Published
- 2022-01-19T18:15:07Z
- Modified
- 2026-09-01T20:04:29Z
- 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 SPF_record_expand_data in spf_expand.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:12 / libspf2
Package
- Name
- libspf2
- Purl
- pkg:deb/debian/libspf2?arch=source&distro=bookworm
Debian:13 / libspf2
Package
- Name
- libspf2
- Purl
- pkg:deb/debian/libspf2?arch=source&distro=trixie
Debian:14 / libspf2
Package
- Name
- libspf2
- Purl
- pkg:deb/debian/libspf2?arch=source&distro=forky