CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:P/I:P/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
Low
EPSS
Percentile
96.0%
USN-4698-1 fixed vulnerabilities in Dnsmasq. The updates introduced
regressions in certain environments related to issues with multiple
queries, and issues with retries. This update fixes the problem.
Original advisory details:
Moshe Kol and Shlomi Oberman discovered that Dnsmasq incorrectly handled
memory when sorting RRsets. A remote attacker could use this issue to cause
Dnsmasq to hang, resulting in a denial of service, or possibly execute
arbitrary code. (CVE-2020-25681, CVE-2020-25687)
Moshe Kol and Shlomi Oberman discovered that Dnsmasq incorrectly handled
extracting certain names. A remote attacker could use this issue to cause
Dnsmasq to hang, resulting in a denial of service, or possibly execute
arbitrary code. (CVE-2020-25682, CVE-2020-25683)
Moshe Kol and Shlomi Oberman discovered that Dnsmasq incorrectly
implemented address/port checks. A remote attacker could use this issue to
perform a cache poisoning attack. (CVE-2020-25684)
Moshe Kol and Shlomi Oberman discovered that Dnsmasq incorrectly
implemented query resource name checks. A remote attacker could use this
issue to perform a cache poisoning attack. (CVE-2020-25685)
Moshe Kol and Shlomi Oberman discovered that Dnsmasq incorrectly handled
multiple query requests for the same resource name. A remote attacker could
use this issue to perform a cache poisoning attack. (CVE-2020-25686)
It was discovered that Dnsmasq incorrectly handled memory during DHCP
response creation. A remote attacker could possibly use this issue to
cause Dnsmasq to consume resources, leading to a denial of service. This
issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 20.04
LTS. (CVE-2019-14834)
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Ubuntu | 20.10 | noarch | dnsmasq | < 2.82-1ubuntu1.2 | UNKNOWN |
Ubuntu | 20.10 | noarch | dnsmasq-base | < 2.82-1ubuntu1.2 | UNKNOWN |
Ubuntu | 20.10 | noarch | dnsmasq-base-lua | < 2.82-1ubuntu1.2 | UNKNOWN |
Ubuntu | 20.10 | noarch | dnsmasq-utils | < 2.82-1ubuntu1.2 | UNKNOWN |
Ubuntu | 20.04 | noarch | dnsmasq | < 2.80-1.1ubuntu1.3 | UNKNOWN |
Ubuntu | 20.04 | noarch | dnsmasq-base | < 2.80-1.1ubuntu1.3 | UNKNOWN |
Ubuntu | 20.04 | noarch | dnsmasq-base-lua | < 2.80-1.1ubuntu1.3 | UNKNOWN |
Ubuntu | 20.04 | noarch | dnsmasq-utils | < 2.80-1.1ubuntu1.3 | UNKNOWN |
Ubuntu | 18.04 | noarch | dnsmasq | < 2.79-1ubuntu0.3 | UNKNOWN |
Ubuntu | 18.04 | noarch | dnsmasq-base | < 2.79-1ubuntu0.3 | UNKNOWN |
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:P/I:P/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
Low
EPSS
Percentile
96.0%