CVE-2022-30699: fedoraproject fedora Insufficient Session Expiration

Vulnerability summary

CVE-2022-30699 is a medium (CVSS 6.5) Insufficient Session Expiration vulnerability in fedoraproject fedora. EPSS estimates a 1.16% chance of exploitation in the next 30 days, higher than 66.5% of scored vulnerabilities.

Timeline

1. 01-08-2022
   PublishedVulnerability first disclosed.
2. 16-09-2024
   Last modifiedVulnerability information updated.

Description

NLnet Labs Unbound, up to and including version 1.16.1, is vulnerable to a novel type of the "ghost domain names" attack. The vulnerability works by targeting an Unbound instance. Unbound is queried for a rogue domain name when the cached delegation information is about to expire. The rogue nameserver delays the response so that the cached delegation information is expired. Upon receiving the delayed answer containing the delegation information, Unbound overwrites the now expired entries. This action can be repeated when the delegation information is about to expire making the rogue delegation information ever-updating. From version 1.16.2 on, Unbound stores the start time for a query and uses that to decide if the cached delegation information can be overwritten.

• CWE-613Insufficient Session ExpirationAccording to WASC, "Insufficient Session Expiration is when a web site permits an attacker to reuse old session credentials or session IDs for authorization."