Summary
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)
Fixed packages 3
| Release | Package | Fixed in |
|---|---|---|
| Ubuntu · 16.04 LTS 16.04:LTS | dnsmasq | 2.75-1ubuntu0.16.04.7 |
| Ubuntu · 18.04 LTS 18.04:LTS | dnsmasq | 2.79-1ubuntu0.2 |
| Ubuntu · 20.04 LTS 20.04:LTS | dnsmasq | 2.80-1.1ubuntu1.2 |
Vulnerabilities 8
-
Low 3.7
A vulnerability was found in dnsmasq before version 2.81, where the memory leak allows remote attackers to cause a deni…
-
Unscored —CVE-2020-25681 EPSS 84%
A flaw was found in dnsmasq before version 2.83. A heap-based buffer overflow was discovered in the way RRSets are sort…
-
Unscored —CVE-2020-25682 EPSS 75%
A flaw was found in dnsmasq before 2.83. A buffer overflow vulnerability was discovered in the way dnsmasq extract name…
-
Unscored —CVE-2020-25683 EPSS 89%
A flaw was found in dnsmasq before version 2.83. A heap-based buffer overflow was discovered in dnsmasq when DNSSEC is …
-
Unscored —
A flaw was found in dnsmasq before version 2.83. When getting a reply from a forwarded query, dnsmasq checks in the for…
-
Unscored —
A flaw was found in dnsmasq before version 2.83. When getting a reply from a forwarded query, dnsmasq checks in forward…
-
Unscored —CVE-2020-25686 Public exploit
A flaw was found in dnsmasq before version 2.83. When receiving a query, dnsmasq does not check for an existing pending…
-
Unscored —CVE-2020-25687 EPSS 89%
A flaw was found in dnsmasq before version 2.83. A heap-based buffer overflow was discovered in dnsmasq when DNSSEC is …
References
-
report
https://ubuntu.com/security/CVE-2019-14834
-
report
https://ubuntu.com/security/CVE-2020-25681
-
report
https://ubuntu.com/security/CVE-2020-25682
-
report
https://ubuntu.com/security/CVE-2020-25683
-
report
https://ubuntu.com/security/CVE-2020-25684
-
report
https://ubuntu.com/security/CVE-2020-25685
-
report
https://ubuntu.com/security/CVE-2020-25686
-
report
https://ubuntu.com/security/CVE-2020-25687