Vulnerabilities
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CVE Vulnerabilities

CVE-2022-30698

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-2022-30698
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 subdomain of a rogue domain name. The rogue nameserver returns delegation information for the subdomain that updates Unbounds delegation cache. This action can be repeated before expiry of the delegation information by querying Unbound for a second level subdomain which the rogue nameserver provides new delegation information. Since Unbound is a child-centric resolver, the ever-updating child delegation information can keep a rogue domain name resolvable long after revocation. From version 1.16.2 on, Unbound checks the validity of parent delegation records before using cached delegation information.

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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