7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
0.648 Medium
EPSS
Percentile
97.9%
In dnsmasq before 2.78, if the DNS packet size does not match the expected size, the size parameter in a memset call gets a negative value. As it is an unsigned value, memset ends up writing up to 0xffffffff zero’s (0xffffffffffffffff in 64 bit platforms), making dnsmasq crash.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Alpine | edge-main | noarch | dnsmasq | < 2.78-r0 | UNKNOWN |
Alpine | 3.10-main | noarch | dnsmasq | < 2.78-r0 | UNKNOWN |
Alpine | 3.11-main | noarch | dnsmasq | < 2.78-r0 | UNKNOWN |
Alpine | 3.12-main | noarch | dnsmasq | < 2.78-r0 | UNKNOWN |
Alpine | 3.13-main | noarch | dnsmasq | < 2.78-r0 | UNKNOWN |
Alpine | 3.14-main | noarch | dnsmasq | < 2.78-r0 | UNKNOWN |
Alpine | 3.15-main | noarch | dnsmasq | < 2.78-r0 | UNKNOWN |
Alpine | 3.16-main | noarch | dnsmasq | < 2.78-r0 | UNKNOWN |
Alpine | 3.17-main | noarch | dnsmasq | < 2.78-r0 | UNKNOWN |
Alpine | 3.18-main | noarch | dnsmasq | < 2.78-r0 | UNKNOWN |
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
0.648 Medium
EPSS
Percentile
97.9%