VDB
CVE-2021-33912
CVE-2021-33912
PUBLISHED
CVSS 9.800000190734863 CRITICAL
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.
EPSS 9.64% · 95.1th percentile
Risk Scores
CVSS 3.1
9.800000190734863
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score
9.64%
95.1th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:Pro:16.04:LTS | libspf2 | 0, 1.2.10-6, * |
| Ubuntu:20.04:LTS | libspf2 | 1.2.10-7build4, 0, 1.2.10-7build3 |
| Ubuntu:Pro:18.04:LTS | libspf2 | 1.2.10-7build2, 0 |
Timeline
- Jan 19, 2022 CVE Published
- Jan 20, 2022 EPSS Score
- Feb 4, 2022 EPSS Score
- May 6, 2022 EPSS Score
- Jun 29, 2022 EPSS Score
- Oct 14, 2022 EPSS Score
- Dec 6, 2022 EPSS Score
- Mar 7, 2023 EPSS Score
- Mar 22, 2023 EPSS Score
- Jul 7, 2023 EPSS Score
- Aug 29, 2023 EPSS Score
- Oct 21, 2023 EPSS Score
References
- https://ubuntu.com/security/CVE-2021-33912 third-party-advisory
- https://github.com/shevek/libspf2/commit/28faf4624a6a371b11afdb9820078d3b0ee3803d third-party-advisory
- https://ubuntu.com/security/notices/USN-6584-1 vendor-advisory
- https://ubuntu.com/security/notices/USN-6584-2 vendor-advisory
- https://www.cve.org/CVERecord?id=CVE-2021-33912 third-party-advisory