CVE-2017-9109 Information

Description

An issue was discovered in adns before 1.5.2. It fails to ignore apparent answers before the first RR that was found the first time. when this is fixed the second answer scan finds the same RRs at the first. Otherwise adns can be confused by interleaving answers for the CNAME target with the CNAME itself. In that case the answer data structure (on the heap) can be overrun. With this fixed it prefers to look only at the answer RRs which come after the CNAME which is at least arguably correct.

CVSS Vector

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

Reference

http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00037.html http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=adns.git http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=adns.git;a=blob;f=changelog https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TRVHN3GGVNQWAOL3PWC5FLAV7HUESLZR/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UGFZ4SPV6KFQK6ZNUZFB5Y32OYFOM5YJ/ https://www.chiark.greenend.org.uk/pipermail/adns-announce/2020/000004.html

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8