CVE-2006-2072: Multiple unspecified vulnerabilities in DeleGate 9.x before 9.0.6 and 8.x before 8.11.6 allow remote attackers

Routine

MEDIUM 5.0DOWNGRADE

CVE-2006-2072 is a medium-severity flaw (CVSS 5.0) affecting delegate. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple unspecified vulnerabilities in DeleGate 9.x before 9.0.6 and 8.x before 8.11.6 allow remote attackers to cause a denial of service via crafted DNS responses messages that cause (1) a buffer over-read or (2) infinite recursion, which can trigger a segmentation fault or invalid memory access, as demonstrated by the OUSPG PROTOS DNS test suite.

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	2.9% (top 13%)
CISA exploited list	No
Published	2006-04-27
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: delegate

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2006-04-27 22:02 UTCPublished CVE record published
2026-06-16 22:24 UTCUpdated Record last modified

delegate delegate DOWNGRADE

Affected: 7.7.0 · 7.7.1 · 7.8.0 · 7.8.1 · 7.8.2 · 7.9.11 · 8.3.3 · 8.3.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.7.0

1. Check installed version

apt-cache policy delegate || rpm -q delegate || delegate --version

2. No fixed release: DOWNGRADE to a release before 7.7.0 (Debian / Ubuntu)

apt-cache madison delegate sudo apt install delegate=<VERSION_BEFORE_7.7.0> sudo apt-mark hold delegate

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list delegate sudo dnf downgrade delegate-<VERSION_BEFORE_7.7.0> sudo dnf versionlock add delegate

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2006-2072?

delegate: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2006-2072 being exploited?

CVE-2006-2072 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2006-2072 affect?

CVE-2006-2072 affects delegate. Severity is medium (CVSS 5.0). Multiple unspecified vulnerabilities in DeleGate 9.x before 9.0.6 and 8.x before 8.11.6 allow remote attackers to cause a denial of service via crafted DNS responses messages that cause (1) a buffer over-read or (2) infinite recursion, whic

How urgent is CVE-2006-2072?

Priority 39/100. No elevated risk signals yet.

Related CVEs

CVE-2015-7556 HIGH 7.8 DOWNGRADE DeleGate 9.9.13 allows local users to gain privileges as demonstrated by the dgcpnod setuid program.
CVE-2005-0861 HIGH 7.5 UPGRADE Multiple buffer overflows in DeleGate before 8.11.1 may allow attackers to cause a denial of service or execut
CVE-2005-0036 MEDIUM 5.0 UPGRADE DOWNGRADE The DNS implementation in DeleGate 8.10.2 and earlier allows remote attackers to cause a denial of service via
CVE-2004-2003 HIGH 7.5 DOWNGRADE Buffer overflow in the ssl_prcert function in the SSLway filter (sslway.c) for DeleGate 8.9.2 and earlier allo
CVE-2004-0789 MEDIUM 5.0 DOWNGRADE DOWNGRADE Multiple implementations of the DNS protocol, including (1) Poslib 1.0.2-1 and earlier as used by Posadis, (2)

References

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