CVE-2017-14495 Denial of service in n/a

What is CVE-2017-14495?

CVE-2017-14495 is a high-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 2 Oct 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Memory leak in dnsmasq before 2.78, when the --add-mac, --add-cpe-id or --add-subnet option is specified, allows remote attackers to cause a denial of service (memory consumption) via vectors involving DNS response creation.

Weakness: CWE-772

Which versions are affected by CVE-2017-14495?

It affects 6 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server, Redhat Enterprise Linux Workstation, Thekelleys Dnsmasq.

How do I fix CVE-2017-14495?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2017-14495 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2017-14495 exists.

Public exploit code: 1 Exploit-DB entry.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as ALPINE-CVE-2017-14495, CLEANSTART-2026-KR50953, DEBIAN-CVE-2017-14495, GHSA-rcfc-xq5g-7phm, UBUNTU-CVE-2017-14495.