5.9 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
7.1 High
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:N/I:N/A:C
0.085 Low
EPSS
Percentile
94.4%
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. A remote attacker, who can create valid DNS replies, could use this flaw 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 get_rdata() and cause a crash in dnsmasq, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Alpine | edge-main | noarch | dnsmasq | < 2.83-r0 | UNKNOWN |
Alpine | 3.10-main | noarch | dnsmasq | < 2.83-r0 | UNKNOWN |
Alpine | 3.11-main | noarch | dnsmasq | < 2.83-r0 | UNKNOWN |
Alpine | 3.12-main | noarch | dnsmasq | < 2.83-r0 | UNKNOWN |
Alpine | 3.13-main | noarch | dnsmasq | < 2.83-r0 | UNKNOWN |
Alpine | 3.14-main | noarch | dnsmasq | < 2.83-r0 | UNKNOWN |
Alpine | 3.15-main | noarch | dnsmasq | < 2.83-r0 | UNKNOWN |
Alpine | 3.16-main | noarch | dnsmasq | < 2.83-r0 | UNKNOWN |
Alpine | 3.17-main | noarch | dnsmasq | < 2.83-r0 | UNKNOWN |
Alpine | 3.18-main | noarch | dnsmasq | < 2.83-r0 | UNKNOWN |
5.9 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
7.1 High
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:N/I:N/A:C
0.085 Low
EPSS
Percentile
94.4%