---
title: "CVE-2017-9106\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2017-9106?format=md
keywords: index, follow
---

# CVE-2017-9106

Publication date 18 June 2020

Last updated 26 August 2025

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

## Cvss 3 Severity Score

**7.5 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2017-9106?format=md#impact-score)

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## 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.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| adns | 26.04 LTS resolute | Not affected |
| 25.10 questing | Not affected |
| 25.04 plucky | Not affected |
| 24.10 oracular | Not affected |
| 24.04 LTS noble | Not affected |
| 23.10 mantic | Not affected |
| 23.04 lunar | Not affected |
| 22.10 kinetic | Not affected |
| 22.04 LTS jammy | Not affected |
| 21.10 impish | Not affected |
| 21.04 hirsute | Not affected |
| 20.10 groovy | Not affected |
| 20.04 LTS focal | Vulnerable |
| 19.10 eoan | Ignored end of life |
| 18.04 LTS bionic | Vulnerable |
| 16.04 LTS xenial | Vulnerable |
| 14.04 LTS trusty | Not in release |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

7.5 · High

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Network |
  | Attack complexity | Low |
  | Privileges required | None |
  | User interaction | None |
  | Scope | Unchanged |
  | Confidentiality impact | None |
  | Integrity impact | None |
  | Availability impact | High |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 7.5 · High |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-9106)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2017-9106)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2017-9106)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2017-9106)

### Other references

* <http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=adns.git;a=commit;h=37792aacaf7abbcdac6a02715a5ef794b5147f13>
* <https://www.cve.org/CVERecord?id=CVE-2017-9106>