CVE-2017-9107

 

Published at: - 18-06-2020 04:15

Last modified: - 28-01-2023 02:01

Total changes: - 2

Description

An issue was discovered in adns before 1.5.2. It overruns reading a buffer if a domain ends with backslash. If the query domain ended with \, and adns_qf_quoteok_query was specified, qdparselabel would read additional bytes from the buffer and try to treat them as the escape sequence. It would depart the input buffer and start processing many bytes of arbitrary heap data as if it were the query domain. Eventually it would run out of input or find some other kind of error, and declare the query domain invalid. But before then it might outrun available memory and crash. In principle this could be a denial of service attack.

Common Vulnerability Scoring System (CVSS)

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

 

Verification logic

 

Reference

• http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=adns.git;a=blob;f=changelog
• https://www.chiark.greenend.org.uk/pipermail/adns-announce/2020/000004.html
• http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=adns.git
• FEDORA-2020-530188bf36-Mailing List, Third Party Advisory
• FEDORA-2020-e59bcaf702-Mailing List, Third Party Advisory

 

Keywords

NVD

 

CVE-2017-9107

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures