CVE-2021-33913
Vulnerability from cvelistv5
Published
2022-01-19 00:00
Modified
2024-08-04 00:05
Severity ?
Summary
libspf2 before 1.2.11 has a 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 SPF_record_expand_data in spf_expand.c. The amount of overflowed data depends on the relationship between the length of an entire domain name and the length of its leftmost label. 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
cve@mitre.orghttps://github.com/shevek/libspf2/tree/8131fe140704eaae695e76b5cd09e39bd1dd220bThird Party Advisory
cve@mitre.orghttps://lists.debian.org/debian-lts-announce/2022/01/msg00015.htmlMailing List, Third Party Advisory
cve@mitre.orghttps://nathanielbennett.com/blog/libspf2-cve-jan-2022-disclosureExploit, Third Party Advisory
cve@mitre.orghttps://security.gentoo.org/glsa/202401-22
af854a3a-2127-422b-91ae-364da2661108https://github.com/shevek/libspf2/tree/8131fe140704eaae695e76b5cd09e39bd1dd220bThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2022/01/msg00015.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://nathanielbennett.com/blog/libspf2-cve-jan-2022-disclosureExploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/202401-22
Impacted products
Vendor Product Version
Show details on NVD website

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