Heap-based buffer overflow in libspf2 - CVE-2021-33913
Published: August 22, 2022
Vulnerability identifier: #VU66695
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2021-33913
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Gnome Development Team
Affected software:
libspf2
libspf2
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error within the spf_expand.c when parsing SPF DNS records. A remote attacker can send an email to the affected server, trigger a heap-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
How to mitigate CVE-2021-33913
Cybersecurity Help is currently unaware of any official solution to address this vulnerability..