CVE-2016-7073: debian debian_linux Improper Input Validation
Vulnerability summary
CVE-2016-7073 is a medium (CVSS 5.9) Improper Input Validation vulnerability in debian debian_linux. EPSS estimates a 1.23% chance of exploitation in the next 30 days, higher than 69% of scored vulnerabilities.
Not severe (CVSS 5.3, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 4 · Related 1Timeline
- 11-09-2018PublishedVulnerability first disclosed.
- 06-08-2024Last modifiedVulnerability information updated.
Description
An issue has been found in PowerDNS before 3.4.11 and 4.0.2, and PowerDNS recursor before 4.0.4, allowing an attacker in position of man-in-the-middle to alter the content of an AXFR because of insufficient validation of TSIG signatures. A missing check of the TSIG time and fudge values was found in AXFRRetriever, leading to a possible replay attack.
CVSS metrics
6 scores · 5 sources · 2 versions- CVE.orgCNA5.3MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:NDiffers
- OSV · UbuntuEcosystem advisory · calculated5.9MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
- OSV · DebianEcosystem advisory · calculated5.9MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
- OSV · AlpineEcosystem advisory · calculated5.9MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS trend
Probability
1.23%
Chance of exploitation in the next 30 days
Percentile
69%
Versus all other CVEs
30-day change
No change 0.00 pp
From 1.23% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Debian3 products
- pdns< 4.0.2-1
- pdns-recursor< 4.0.4-1
- debian_linuxEOL8.0
Alpine2 products
- pdns< 4.0.3-r0
- pdns-recursor< 4.0.4-r0
Powerdns2 products
- authoritative< 3.4.11 | ≥ 4.0.0, < 4.0.2
- recursor< 3.7.4 | ≥ 4.0.0, < 4.0.4
Ubuntu2 products
- pdnsAll versions (No fix recorded)
- pdns-recursorAll versions (No fix recorded)
Open-xchange1 product
- pdns3.4.11 | 4.0.2 | 4.0.4
5 vendors · 10 products
References
7 links- bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-7073X Refsource CONFIRMIssue TrackingThird Party Advisory
