Insufficient verification of data authenticity in dnsmasq (Alpine package)



Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-25686
CWE-ID CWE-345
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
 dnsmasq (Alpine package)
Operating systems & Components / Operating system package or component

Vendor Alpine Linux Development Team

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Insufficient verification of data authenticity

EUVDB-ID: #VU49845

Risk: Low

CVSSv4.0: 2.9 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2020-25686

CWE-ID: CWE-345 - Insufficient Verification of Data Authenticity

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to the affected software does not check for an existing pending request for the same name and forwards a new request. A remote attacker can perform a DNS cache poisoning attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

dnsmasq (Alpine package): 2.81-r0 - 2.82-r0

CPE2.3 External links

https://git.alpinelinux.org/aports/commit/?id=a15e4f2f871b2eba5b89654ccff9fb9b95f19cbc
https://git.alpinelinux.org/aports/commit/?id=8e0a99d327346c97a25d2e7103480d0c41c0f4e9
https://git.alpinelinux.org/aports/commit/?id=b0ea8cb6658527d733f801d3183d555681f18da2


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.



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