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ubuntuUbuntuUSN-5569-1
HistoryAug 16, 2022 - 12:00 a.m.

Unbound vulnerabilities

2022-08-1600:00:00
ubuntu.com
48
unbound
ubuntu
dns resolver
vulnerability
delegation caching

CVSS3

6.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

AI Score

7

Confidence

High

EPSS

0.001

Percentile

45.3%

Releases

  • Ubuntu 22.04 LTS
  • Ubuntu 20.04 LTS
  • Ubuntu 18.04 ESM

Packages

  • unbound - validating, recursive, caching DNS resolver

Details

Xiang Li discovered that Unbound incorrectly handled delegation caching.
A remote attacker could use this issue to keep rogue domain names
resolvable long after they have been revoked.

Rows per page:
1-10 of 371

CVSS3

6.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

AI Score

7

Confidence

High

EPSS

0.001

Percentile

45.3%