Arch Linux update for c-ares



Published: 2020-11-20
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2020-8277
CWE ID CWE-399
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
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Arch Linux
Operating systems & Components / Operating system

Vendor Arch Linux

Security Advisory

This security advisory describes one medium risk vulnerability.

1) Resource management error

Risk: Medium

CVSSv3: 5.3 [CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C] [PCI]

CVE-ID: CVE-2020-8277

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: Yes [Search exploit]

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper management of internal resources within the application when processing a large number of DNS responses. A Node.js application that allows an attacker to trigger a DNS request for a host of their choice could trigger a denial of service condition.

Mitigation

Update the affected package c-ares to version 1.17.1-1.

Vulnerable software versions

Arch Linux: All versions

CPE External links

https://security.archlinux.org/advisory/ASA-202011-18

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. However, proof of concept for this vulnerability is available.