Debian update for bind9



Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-8625
CWE-ID CWE-119
Exploitation vector Network
Public exploit N/A
Vulnerable software
 bind9 (Debian package)
Operating systems & Components / Operating system package or component

Vendor Debian

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Buffer overflow

EUVDB-ID: #VU50780

Risk: High

CVSSv4.0: 7.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2020-8625

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the SPNEGO implementation in the GSS-TSIG extension. A remote attacker can send a specially crafted DNS request to the server, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update bind9 package to version 1:9.11.5.P4+dfsg-5.1+deb10u3.

Vulnerable software versions

bind9 (Debian package): 1:9.11.5.P4+dfsg-5.1+deb10u1 - 9.11.5.P4+dfsg-5.1+deb10u2

CPE2.3 External links

https://www.debian.org/security/2021/dsa-4857


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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