CVE-2017-9103 Information

Description

An issue was discovered in adns before 1.5.2. pap_mailbox822 does not properly check st from adns__findlabel_next. Without this an uninitialised stack value can be used as the first label length. Depending on the circumstances an attacker might be able to trick adns into crashing the calling program leaking aspects of the contents of some of its memory causing it to allocate lots of memory or perhaps overrunning a buffer. This is only possible with applications which make non-raw queries for SOA or RP records.

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