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CVE-2017-9107

7.5 · HIGH

An issue was discovered in adns before 1.5.2.

Published Jun 18, 2020CWE-119EPSS 1.85%

Overview

CVE-2017-9107 is a high-severity vulnerability. It was published on June 18, 2020 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refwww.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=adns.gitRefwww.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=adns.git%3Ba=blob%3Bf=changelogReflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TRVHN3GGVNQWAOL3PWC5FLAV7HUESLZR/Reflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UGFZ4SPV6KFQK6ZNUZFB5Y32OYFOM5YJ/Refwww.chiark.greenend.org.uk/pipermail/adns-announce/2020/000004.htmlRefwww.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=adns.gitRefwww.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=adns.git%3Ba=blob%3Bf=changelogReflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TRVHN3GGVNQWAOL3PWC5FLAV7HUESLZR/Reflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UGFZ4SPV6KFQK6ZNUZFB5Y32OYFOM5YJ/Refwww.chiark.greenend.org.uk/pipermail/adns-announce/2020/000004.html

How CyberStrike helps

Frequently asked questions

What is CVE-2017-9107?

CVE-2017-9107 is a high-severity vulnerability. It was published on June 18, 2020 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2017-9107?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2017-9107?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2017-9107?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2017-9107 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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