A flaw was found in dnsmasq before version 2.83. A heap-based buffer overflow was discovered in the way RRSets are sorted before validating with DNSSEC data. An attacker on the network, who can forge DNS replies such as that they are accepted as valid, could use this flaw to cause a buffer overflow with arbitrary data in a heap memory segment, possibly executing code on the machine. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
NOTE: The following CVSS v3.0 metrics and score provided are preliminary and subject to review.
|Base Score:||8.1||Base Metrics:||AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H|
|Access Vector:||Network||Attack Complexity:||High|
|Privileges Required:||None||User Interaction:||None|
|Integrity Impact:||High||Availability Impact:||High|
|Oracle Linux version 8 (dnsmasq)||ELSA-2021-0150||2021-01-20|
This page is generated automatically and has not been checked for errors or omissions. For clarification or corrections please contact the Oracle Linux ULN team