CVE-2007-6118: The MEGACO dissector in Wireshark (formerly Ethereal) 0.9.14 to 0.99.6 allows remote attackers to cause a deni

This month

HIGH 7.8DOWNGRADEDOWNGRADE

CVE-2007-6118 is a high-severity flaw (CVSS 7.8) affecting ethereal, wireshark. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The MEGACO dissector in Wireshark (formerly Ethereal) 0.9.14 to 0.99.6 allows remote attackers to cause a denial of service (long loop and resource consumption) via unknown vectors.

Why this priority

High severity

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

Risk facts

CVSS score	7.8 (High)
EPSS exploit chance	2.3% (top 17%)
CISA exploited list	No
Published	2007-11-23
Last modified	2026-06-16

Publisher (CNA): Red Hat, Inc. · Vendor: ethereal group · wireshark

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

Am I affected?

Timeline

2007-11-23 20:46 UTCPublished CVE record published
2026-06-16 22:47 UTCUpdated Record last modified

ethereal group ethereal DOWNGRADE

Affected: 0.9.14 · 0.9.15 · 0.9.16 · 0.99.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.9.14

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.9.14 (Debian / Ubuntu)

apt-cache madison ethereal sudo apt install ethereal=<VERSION_BEFORE_0.9.14> sudo apt-mark hold ethereal

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

dnf --showduplicates list ethereal sudo dnf downgrade ethereal-<VERSION_BEFORE_0.9.14> sudo dnf versionlock add ethereal

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.

wireshark wireshark DOWNGRADE

Affected: 0.99 · 0.99.0 · 0.99.1 · 0.99.2 · 0.99.3 · 0.99.4 · 0.99.5 · 0.99.6

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.99

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.99 (Debian / Ubuntu)

apt-cache madison wireshark sudo apt install wireshark=<VERSION_BEFORE_0.99> sudo apt-mark hold wireshark

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

dnf --showduplicates list wireshark sudo dnf downgrade wireshark-<VERSION_BEFORE_0.99> sudo dnf versionlock add wireshark

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-2007-6118?

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

Is CVE-2007-6118 being exploited?

CVE-2007-6118 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-2007-6118 affect?

CVE-2007-6118 affects ethereal, wireshark. Severity is high (CVSS 7.8). The MEGACO dissector in Wireshark (formerly Ethereal) 0.9.14 to 0.99.6 allows remote attackers to cause a denial of service (long loop and resource consumption) via unknown vectors.

How urgent is CVE-2007-6118?

Priority 48/100. High severity

Related CVEs

CVE-2010-1455 MEDIUM 4.3 DOWNGRADE DOWNGRADE The DOCSIS dissector in Wireshark 0.9.6 through 1.0.12 and 1.2.0 through 1.2.7 allows user-assisted remote att
CVE-2007-6121 MEDIUM 5.0 DOWNGRADE DOWNGRADE Wireshark (formerly Ethereal) 0.8.16 to 0.99.6 allows remote attackers to cause a denial of service (crash) vi
CVE-2007-6120 MEDIUM 5.0 DOWNGRADE DOWNGRADE The Bluetooth SDP dissector Wireshark (formerly Ethereal) 0.99.2 to 0.99.6 allows remote attackers to cause a
CVE-2007-6111 HIGH 7.1 DOWNGRADE DOWNGRADE Multiple unspecified vulnerabilities in Wireshark (formerly Ethereal) allow remote attackers to cause a denial
CVE-2006-3632 HIGH 10.0 DOWNGRADE Buffer overflow in Wireshark (aka Ethereal) 0.8.16 to 0.99.0 allows remote attackers to cause a denial of serv

References

← Back to latest CVEs