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Vulnerability & Exploit Database

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Centos Linux: CVE-2020-25687: (CESA-2021:0150)

Severity:
7
CVSS:
(AV:N/AC:M/Au:N/C:N/I:N/A:C)
Published:
01/19/2020
Created:
01/20/2020
Added:
01/20/2020
Modified:
02/24/2020

Description:

A flaw was found in dnsmasq before version 2.83. A heap-based buffer overflow was discovered in dnsmasq when DNSSEC is enabled and before it validates the received DNS entries. This flaw allows a remote attacker, who can create valid DNS replies, to cause an overflow in a heap-allocated memory. This flaw is caused by the lack of length checks in rfc1035.c:extract_name(), which could be abused to make the code execute memcpy() with a negative size in sort_rrset() and cause a crash in dnsmasq, resulting in a denial of service. The highest threat from this vulnerability is to system availability.'

Solution(s)


  • centos-upgrade-dnsmasq
  • centos-upgrade-dnsmasq-debuginfo
  • centos-upgrade-dnsmasq-debugsource
  • centos-upgrade-dnsmasq-utils
  • centos-upgrade-dnsmasq-utils-debuginfo
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