Vulnerability 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 Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Gnu | Adns | < 1.5.2 |
| Opensuse | Leap | 15.1 |
| Fedoraproject | Fedora | 31 |
Related Weaknesses (CWE)
References
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00037.htmlMailing ListThird 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=cha
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://www.chiark.greenend.org.uk/pipermail/adns-announce/2020/000004.htmlRelease NotesThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00037.htmlMailing ListThird 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=cha
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://www.chiark.greenend.org.uk/pipermail/adns-announce/2020/000004.htmlRelease NotesThird Party Advisory
FAQ
What is CVE-2017-9109?
CVE-2017-9109 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 th...
How severe is CVE-2017-9109?
CVE-2017-9109 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2017-9109?
Check the references section above for vendor advisories and patch information. Affected products include: Gnu Adns, Opensuse Leap, Fedoraproject Fedora.