CVE-2020-25829 Denial of service in n/a

What is CVE-2020-25829?

CVE-2020-25829 is a high-severity denial of service vulnerability in Opensuse Backports Sle, published on 16 Oct 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An issue has been found in PowerDNS Recursor before 4.1.18, 4.2.x before 4.2.5, and 4.3.x before 4.3.5. A remote attacker can cause the cached records for a given name to be updated to the Bogus DNSSEC validation state, instead of their actual DNSSEC Secure state, via a DNS ANY query. This results in a denial of service for installation that always validate (dnssec=validate), and for clients requesting validation when on-demand validation is enabled (dnssec=process).

Which versions are affected by CVE-2020-25829?

It affects 3 products.

Products include Opensuse Backports Sle, Opensuse Leap, Powerdns Recursor.

How do I fix CVE-2020-25829?

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-2020-25829 being exploited?

There is no known exploitation of CVE-2020-25829 in the wild and no public exploit code.

Other vulnerabilities in Opensuse Backports Sle

• CVE-2020-12641 Roundcube Webmail Remote Code Execution Exploited Critical 9.8
• CVE-2020-12640 Path traversal in n/a Critical 9.8
• CVE-2020-8233 Command injection in EdgeSwitch firmware v1.9.0 and prior High 8.8
• CVE-2020-8026 inn: non-root owned files High 8.4
• CVE-2020-15229 Path traversal and files overwrite with unsquashfs High 8.2

All Opensuse Backports Sle vulnerabilities

Sources

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

Also known as DEBIAN-CVE-2020-25829, GHSA-w93h-8xj5-rq44, MGASA-2020-0393, UBUNTU-CVE-2020-25829.