Amazon Linux AMI update for c-ares



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
 Amazon Linux AMI
Operating systems & Components / Operating system

Vendor Amazon Web Services

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Input validation error

EUVDB-ID: #VU56967

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-3672

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The 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.

Mitigation

Update the affected packages:

i686:
    c-ares-debuginfo-1.17.2-1.8.amzn1.i686
    c-ares-devel-1.17.2-1.8.amzn1.i686
    c-ares-1.17.2-1.8.amzn1.i686

src:
    c-ares-1.17.2-1.8.amzn1.src

x86_64:
    c-ares-devel-1.17.2-1.8.amzn1.x86_64
    c-ares-1.17.2-1.8.amzn1.x86_64
    c-ares-debuginfo-1.17.2-1.8.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

CPE2.3 External links

https://alas.aws.amazon.com/ALAS-2021-1545.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.



###SIDEBAR###