CVE-2021-33912
libspf2 before 1.2.11 has a four-byte heap-based buffer overflow that ...
Severity by source
Trivy's own label is CRITICAL. Rated critical by NVD. Rated lower by Ubuntu (medium).
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.
Affected packages and fixed versions
| Source | Package | Fixed in |
|---|---|---|
| alpine 3.14 | libspf2 | 1.2.11-r0 |
| alpine 3.15 | libspf2 | 1.2.11-r0 |
| alpine 3.16 | libspf2 | 1.2.11-r0 |
| alpine 3.17 | libspf2 | 1.2.11-r0 |
| alpine 3.18 | libspf2 | 1.2.11-r0 |
| alpine 3.19 | libspf2 | 1.2.11-r0 |
| alpine 3.20 | libspf2 | 1.2.11-r0 |
| alpine 3.21 | libspf2 | 1.2.11-r0 |
| alpine 3.22 | libspf2 | 1.2.11-r0 |
| alpine 3.23 | libspf2 | 1.2.11-r0 |
| alpine 3.24 | libspf2 | 1.2.11-r0 |
| alpine edge | libspf2 | 1.2.11-r0 |
Show all 23 entries from 23 sources
| Source | Package | Fixed in |
|---|---|---|
| alpine 3.14 | libspf2 | 1.2.11-r0 |
| alpine 3.15 | libspf2 | 1.2.11-r0 |
| alpine 3.16 | libspf2 | 1.2.11-r0 |
| alpine 3.17 | libspf2 | 1.2.11-r0 |
| alpine 3.18 | libspf2 | 1.2.11-r0 |
| alpine 3.19 | libspf2 | 1.2.11-r0 |
| alpine 3.20 | libspf2 | 1.2.11-r0 |
| alpine 3.21 | libspf2 | 1.2.11-r0 |
| alpine 3.22 | libspf2 | 1.2.11-r0 |
| alpine 3.23 | libspf2 | 1.2.11-r0 |
| alpine 3.24 | libspf2 | 1.2.11-r0 |
| alpine edge | libspf2 | 1.2.11-r0 |
| debian 10 | libspf2 | 1.2.10-7.1~deb10u1 |
| debian 11 | libspf2 | 1.2.10-7.1~deb11u1 |
| debian 12 | libspf2 | 1.2.10-7.1 |
| debian 13 | libspf2 | 1.2.10-7.1 |
| debian 14 | libspf2 | 1.2.10-7.1 |
| debian 9 | libspf2 | 1.2.10-7+deb9u2 |
| echo | libspf2 | 1.2.10-7.1 |
| ubuntu 16.04-ESM | libspf2 | 1.2.10-6ubuntu0.1~esm2 |
| ubuntu 18.04-ESM | libspf2 | 1.2.10-7ubuntu0.18.04.1~esm1 |
| ubuntu 20.04 | libspf2 | 1.2.10-7+deb9u2build0.20.04.1 |
| ubuntu 20.04-ESM | libspf2 | 1.2.10-7+deb9u2build0.20.04.1 |
References
- https://github.com/shevek/libspf2/commit/28faf4624a6a371b11afdb9820078d3b0ee3803d
- https://github.com/shevek/libspf2/tree/8131fe140704eaae695e76b5cd09e39bd1dd220b
- https://lists.debian.org/debian-lts-announce/2022/01/msg00015.html
- https://nathanielbennett.com/blog/libspf2-cve-jan-2022-disclosure
- https://security.gentoo.org/glsa/202401-22
- https://ubuntu.com/security/notices/USN-6584-1
- https://ubuntu.com/security/notices/USN-6584-2
- https://www.cve.org/CVERecord?id=CVE-2021-33912