CVE-2016-5180
c-ares: Single byte out of buffer write
Severity
ModerateRed Hat Product Security
CVSS 3.0
Review impact separately from score.
Published · September 29, 2016
Updated · June 28, 2026
Description
A vulnerability was found in c-ares. A hostname with an escaped trailing dot (such as "hello.") would have its size calculated incorrectly, leading to a single byte written beyond the end of a buffer on the heap. An attacker able to provide such a hostname to an application using c-ares, could potentially cause that application to crash.
Statement
Red Hat Product Security has rated this issue as having Moderate security impact. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.0 · 5.3CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS 2.0 · 5AV:N/AC:L/Au:N/C:N/I:N/A:P
CWE-787 · Out-of-bounds Write