1. CVE-Search
  2. CVE-2021-33913
ID CVE-2021-33913
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
Vulnerable Configurations
  • cpe:2.3:a:libspf2_project:libspf2:-:*:*:*:*:*:*:*
    cpe:2.3:a:libspf2_project:libspf2:-:*:*:*:*:*:*:*
  • cpe:2.3:a:libspf2_project:libspf2:0.4.0:*:*:*:*:*:*:*
    cpe:2.3:a:libspf2_project:libspf2:0.4.0:*:*:*:*:*:*:*
  • cpe:2.3:a:libspf2_project:libspf2:1.0.2:*:*:*:*:*:*:*
    cpe:2.3:a:libspf2_project:libspf2:1.0.2:*:*:*:*:*:*:*
  • cpe:2.3:a:libspf2_project:libspf2:1.0.3:*:*:*:*:*:*:*
    cpe:2.3:a:libspf2_project:libspf2:1.0.3:*:*:*:*:*:*:*
  • cpe:2.3:a:libspf2_project:libspf2:1.0.4:*:*:*:*:*:*:*
    cpe:2.3:a:libspf2_project:libspf2:1.0.4:*:*:*:*:*:*:*
  • cpe:2.3:a:libspf2_project:libspf2:1.2.1:*:*:*:*:*:*:*
    cpe:2.3:a:libspf2_project:libspf2:1.2.1:*:*:*:*:*:*:*
  • cpe:2.3:a:libspf2_project:libspf2:1.2.2:*:*:*:*:*:*:*
    cpe:2.3:a:libspf2_project:libspf2:1.2.2:*:*:*:*:*:*:*
  • cpe:2.3:a:libspf2_project:libspf2:1.2.3:*:*:*:*:*:*:*
    cpe:2.3:a:libspf2_project:libspf2:1.2.3:*:*:*:*:*:*:*
  • cpe:2.3:a:libspf2_project:libspf2:1.2.4:*:*:*:*:*:*:*
    cpe:2.3:a:libspf2_project:libspf2:1.2.4:*:*:*:*:*:*:*
  • cpe:2.3:a:libspf2_project:libspf2:1.2.5:*:*:*:*:*:*:*
    cpe:2.3:a:libspf2_project:libspf2:1.2.5:*:*:*:*:*:*:*
  • cpe:2.3:a:libspf2_project:libspf2:1.2.6:*:*:*:*:*:*:*
    cpe:2.3:a:libspf2_project:libspf2:1.2.6:*:*:*:*:*:*:*
  • cpe:2.3:a:libspf2_project:libspf2:1.2.7:*:*:*:*:*:*:*
    cpe:2.3:a:libspf2_project:libspf2:1.2.7:*:*:*:*:*:*:*
  • cpe:2.3:a:libspf2_project:libspf2:1.2.8:*:*:*:*:*:*:*
    cpe:2.3:a:libspf2_project:libspf2:1.2.8:*:*:*:*:*:*:*
  • cpe:2.3:a:libspf2_project:libspf2:1.2.9:*:*:*:*:*:*:*
    cpe:2.3:a:libspf2_project:libspf2:1.2.9:*:*:*:*:*:*:*
  • cpe:2.3:a:libspf2_project:libspf2:1.2.10:*:*:*:*:*:*:*
    cpe:2.3:a:libspf2_project:libspf2:1.2.10:*:*:*:*:*:*:*
CVSS
Base: 9.3 (as of 15-01-2024 - 17:15)
Impact:
Exploitability:
CWE CWE-787
CAPEC
Access
VectorComplexityAuthentication
NETWORK MEDIUM NONE
Impact
ConfidentialityIntegrityAvailability
COMPLETE COMPLETE COMPLETE
cvss-vector via4 AV:N/AC:M/Au:N/C:C/I:C/A:C
Last major update 15-01-2024 - 17:15
Published 19-01-2022 - 18:15
Last modified 15-01-2024 - 17:15
Back to Top