Fedora 29 update for bind, bind-dyndb-ldap, dhcp, dnsperf



| Updated: 2025-04-25
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2019-6471
CWE-ID CWE-362
Exploitation vector Network
Public exploit N/A
Vulnerable software
Fedora
Operating systems & Components / Operating system

dnsperf
Operating systems & Components / Operating system package or component

dhcp
Operating systems & Components / Operating system package or component

bind-dyndb-ldap
Operating systems & Components / Operating system package or component

bind
Operating systems & Components / Operating system package or component

Vendor Fedoraproject

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Race condition

EUVDB-ID: #VU21568

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-6471

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: No

Description

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

The vulnerability exists due to a race condition when processing DNS requests in dispatch.c. A remote attacker can send specially crafted DNS packets to the affected daemon, trigger a REQUIRE assertion failure and crash the DNS server.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 29

dnsperf: before 2.3.0-1.fc29

dhcp: before 4.3.6-32.fc29

bind-dyndb-ldap: before 11.1-17.fc29

bind: before 9.11.8-1.fc29

CPE2.3 External links

https://bodhi.fedoraproject.org/updates/FEDORA-2019-b6f0495f51


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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