Risk | Medium |
Patch available | YES |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2021-3672 |
CWE-ID | CWE-20 |
Exploitation vector | Network |
Public exploit | N/A |
Vulnerable software Subscribe |
c-ares Universal components / Libraries / Libraries used by multiple products |
Vendor | c-ares.haxx.se |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
EUVDB-ID: #VU56967
Risk: Medium
CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-3672
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to hijack domains.
The vulnerability exists due to insufficient validation of host names, returned by the DNS server. A remote attacker can pass specially crafted input to the application and perform domain hijacking.
Install updates from vendor's website.
Vulnerable software versionsc-ares: 1.0.0 - 1.17.1
External linkshttp://bugzilla.redhat.com/show_bug.cgi?id=1988342
http://c-ares.haxx.se/adv_20210810.html
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.