Reachable Assertion in bind (Alpine package)



Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-8623
CWE-ID CWE-617
Exploitation vector Network
Public exploit N/A
Vulnerable software
 bind (Alpine package)
Operating systems & Components / Operating system package or component

Vendor Alpine Linux Development Team

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Reachable Assertion

EUVDB-ID: #VU45818

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-8623

CWE-ID: CWE-617 - Reachable Assertion

Exploit availability: No

Description

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

The vulnerability exists due to a reachable assertion when processing DNS query for a zone signed with RSA. A remote attacker can send a specially crafted query and crash the DNS server.

Successful exploitation of the vulnerability requires that BIND is built with "--enable-native-pkcs11".

Mitigation

Install update from vendor's website.

Vulnerable software versions

bind (Alpine package): 9.10.3-r0 - 9.16.5-r0

CPE2.3 External links

https://git.alpinelinux.org/aports/commit/?id=552c94635b72b576bfec8998742e244004c22aa4


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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