CVE-2021-33912

Name
CVE-2021-33912
Description
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.
NVD Severity
high
Other trackers
Mailing lists
Exploits
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
MISC https://github.com/shevek/libspf2/tree/8131fe140704eaae695e76b5cd09e39bd1dd220b
MISC https://nathanielbennett.com/blog/libspf2-cve-jan-2022-disclosure
MLIST https://lists.debian.org/debian-lts-announce/2022/01/msg00015.html

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:libspf2_project:libspf2:*:*:*:*:*:*:*:* libspf2 >= None < 1.2.11

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
libspf2 3.15-main 1.2.10-r6 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
libspf2 3.14-main 1.2.10-r5 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
libspf2 3.13-main 1.2.10-r5 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
libspf2 3.12-main 1.2.10-r5 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
libspf2 edge-main 1.2.11-r0 Natanael Copa <ncopa@alpinelinux.org> fixed