Vulnerability · Published May 19, 2020 · Assigned by mitre
CVE-2020-10030
High 8.8
In plain English
A high-severity security flaw in the pdns-recursor package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 24.5% (higher than 98% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
An issue has been found in PowerDNS Recursor 4.1.0 up to and including 4.3.0. It allows an attacker (with enough privileges to change the system's hostname) to cause disclosure of uninitialized memory content via a stack-based out-of-bounds read. It only occurs on systems where gethostname() does not have '\0' termination of the returned string if the hostname is larger than the supplied buffer. (Linux systems are not affected because the buffer is always large enough. OpenBSD systems are not affected because the returned hostname always has '\0' termination.) Under some conditions, this issue can lead to the writing of one '\0' byte out-of-bounds on the stack, causing a denial of service or possibly arbitrary code execution.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | pdns-recursor | 4.3.1-1 | DEBIAN-CVE-2020-10030 |
| Debian:13 | pdns-recursor | 4.3.1-1 | DEBIAN-CVE-2020-10030 |
| Debian:14 | pdns-recursor | 4.3.1-1 | DEBIAN-CVE-2020-10030 |
Affected products (as reported)
References
- https://doc.powerdns.com/recursor/security-advisories/powerdns-advisory-2020-03.html x_refsource_CONFIRM
- openSUSE-SU-2020:0698 vendor-advisory, x_refsource_SUSE
- FEDORA-2020-d9abb0c06d vendor-advisory, x_refsource_FEDORA
- FEDORA-2020-c0ff3df740 vendor-advisory, x_refsource_FEDORA