Vulnerability Description
An issue was discovered in adns before 1.5.2. adns_rr_info mishandles a bogus *datap. The general pattern for formatting integers is to sprintf into a fixed-size buffer. This is correct if the input is in the right range; if it isn't, the buffer may be overrun (depending on the sizes of the types on the current platform). Of course the inputs ought to be right. And there are pointers in there too, so perhaps one could say that the caller ought to check these things. It may be better to require the caller to make the pointer structure right, but to have the code here be defensive about (and tolerate with an error but without crashing) out-of-range integer values. So: it should defend each of these integer conversion sites with a check for the actual permitted range, and return adns_s_invaliddata if not. The lack of this check causes the SOA sign extension bug to be a serious security problem: the sign extended SOA value is out of range, and overruns the buffer when reconverted. This is related to sign extending SOA 32-bit integer fields, and use of a signed data type.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Gnu | Adns | < 1.5.2 |
| Fedoraproject | Fedora | 31 |
Related Weaknesses (CWE)
References
- 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://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-2017-9106?
CVE-2017-9106 is a vulnerability with a CVSS score of 7.5 (HIGH). An issue was discovered in adns before 1.5.2. adns_rr_info mishandles a bogus *datap. The general pattern for formatting integers is to sprintf into a fixed-size buffer. This is correct if the input i...
How severe is CVE-2017-9106?
CVE-2017-9106 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2017-9106?
Check the references section above for vendor advisories and patch information. Affected products include: Gnu Adns, Fedoraproject Fedora.