Vulnerabilities
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CVE Vulnerabilities

CVE-2022-30699

Insufficient Session Expiration

Published: Aug 01, 2022 | Modified: Nov 21, 2024
CVSS 3.x
6.5
MEDIUM
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS 2.x
RedHat/V2
RedHat/V3
6.5 MODERATE
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2022-30699
CWEhttps://cwe.mitre.org/data/definitions/613.html

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.

Weakness

According to WASC, “Insufficient Session Expiration is when a web site permits an attacker to reuse old session credentials or session IDs for authorization.”

Affected Software

NameVendorStart VersionEnd Version
UnboundNlnetlabs*1.16.2 (excluding)
Red Hat Enterprise Linux 8RedHatunbound-0:1.16.2-2.el8*
Red Hat Enterprise Linux 8.6 Extended Update SupportRedHatunbound-0:1.7.3-17.el8_6.5*
Red Hat Enterprise Linux 9RedHatunbound-0:1.16.2-2.el9*
UnboundUbuntubionic*
UnboundUbuntudevel*
UnboundUbuntuesm-infra-legacy/trusty*
UnboundUbuntuesm-infra/bionic*
UnboundUbuntuesm-infra/focal*
UnboundUbuntuesm-infra/xenial*
UnboundUbuntufocal*
UnboundUbuntujammy*
UnboundUbuntukinetic*
UnboundUbuntulunar*
UnboundUbuntumantic*
UnboundUbuntunoble*
UnboundUbuntuoracular*
UnboundUbuntuplucky*
UnboundUbuntuquesting*
UnboundUbuntutrusty*
UnboundUbuntutrusty/esm*
UnboundUbuntuupstream*
UnboundUbuntuxenial*

Potential Mitigations

References

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