CVE-2016-7069: open-xchange dnsdist Improper Input Validation
Vulnerability summary
CVE-2016-7069 is a high (CVSS 7.5) Improper Input Validation vulnerability in open-xchange dnsdist. EPSS estimates a 4.58% chance of exploitation in the next 30 days, higher than 91.5% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 4 · Related 4Timeline
- 11-09-2018PublishedVulnerability first disclosed.
- 06-08-2024Last modifiedVulnerability information updated.
Description
An issue has been found in dnsdist before 1.2.0 in the way EDNS0 OPT records are handled when parsing responses from a backend. When dnsdist is configured to add EDNS Client Subnet to a query, the response may contain an EDNS0 OPT record that has to be removed before forwarding the response to the initial client. On a 32-bit system, the pointer arithmetic used when parsing the received response to remove that record might trigger an undefined behavior leading to a crash.
CVSS metrics
5 scores · 4 sources · 2 versions- CVE.orgCNA5.9MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:HDiffers
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
4.58%
Chance of exploitation in the next 30 days
Percentile
92%
Versus all other CVEs
30-day change
0.00 pp
From 4.58% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Debian1 product
- dnsdist< 1.2.0-1
Open-xchange1 product
- dnsdist1.2.0
Powerdns1 product
- dnsdist≤ 1.2.0
Ubuntu1 product
- dnsdistAll versions (No fix recorded)
4 vendors · 4 products
References
7 links- bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-7069X Refsource CONFIRMIssue TrackingThird Party Advisory
- dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2017-01.htmlX Refsource CONFIRMPatchVendor AdvisoryREPORT
