Ubuntu: USN-6584-1 (CVE-2021-33912): Libspf2 vulnerabilities
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.
Solution(s)
- ubuntu-pro-upgrade-libmail-spf-xs-perl
- ubuntu-pro-upgrade-libspf2-2
- ubuntu-pro-upgrade-libspf2-dev
- ubuntu-pro-upgrade-spfquery
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