CVE-2017-9109

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.

• CWE-119

• http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00037.htmlMailing List, Third Party Advisory
• http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=adns.gitThird Party Advisory
• http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=adns.git%3Ba=blob%3Bf=changelog
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TRVHN3GGVNQWAOL3PWC5FLAV7HUESLZR/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UGFZ4SPV6KFQK6ZNUZFB5Y32OYFOM5YJ/
• https://www.chiark.greenend.org.uk/pipermail/adns-announce/2020/000004.htmlRelease Notes, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00037.htmlMailing List, Third Party Advisory
• http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=adns.gitThird Party Advisory
• http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=adns.git%3Ba=blob%3Bf=changelog
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TRVHN3GGVNQWAOL3PWC5FLAV7HUESLZR/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UGFZ4SPV6KFQK6ZNUZFB5Y32OYFOM5YJ/
• https://www.chiark.greenend.org.uk/pipermail/adns-announce/2020/000004.htmlRelease Notes, Third Party Advisory

Published

Jun 18, 2020

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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