CVE-2002-2049: configure for Dsniff 2.3, fragroute 1.2, and fragrouter 1.6, when downloaded from monkey.org on May 17, 2002,

This month

HIGH 7.5DOWNGRADEDOWNGRADEDOWNGRADE

CVE-2002-2049 is a high-severity flaw (CVSS 7.5) affecting dsniff, fragroute, fragrouter. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

configure for Dsniff 2.3, fragroute 1.2, and fragrouter 1.6, when downloaded from monkey.org on May 17, 2002, has been modified to contain a backdoor, which allows remote attackers to access the system.

Why this priority

High severity

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

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	1.6% (top 24%)
CISA exploited list	No
Published	2002-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: dug song

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

Am I affected?

Timeline

2002-12-31 05:00 UTCPublished CVE record published
2026-06-16 22:00 UTCUpdated Record last modified

dug song dsniff DOWNGRADE

Affected: 2.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.3

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.3 (Debian / Ubuntu)

apt-cache madison dsniff sudo apt install dsniff=<VERSION_BEFORE_2.3> sudo apt-mark hold dsniff

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

dnf --showduplicates list dsniff sudo dnf downgrade dsniff-<VERSION_BEFORE_2.3> sudo dnf versionlock add dsniff

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.

dug song fragroute DOWNGRADE

Affected: 1.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.2

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.2 (Debian / Ubuntu)

apt-cache madison fragroute sudo apt install fragroute=<VERSION_BEFORE_1.2> sudo apt-mark hold fragroute

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

dnf --showduplicates list fragroute sudo dnf downgrade fragroute-<VERSION_BEFORE_1.2> sudo dnf versionlock add fragroute

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.

dug song fragrouter DOWNGRADE

Affected: 1.6

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.6

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.6 (Debian / Ubuntu)

apt-cache madison fragrouter sudo apt install fragrouter=<VERSION_BEFORE_1.6> sudo apt-mark hold fragrouter

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

dnf --showduplicates list fragrouter sudo dnf downgrade fragrouter-<VERSION_BEFORE_1.6> sudo dnf versionlock add fragrouter

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-2002-2049?

dsniff: downgrade or apply the listed mitigation; fragroute: downgrade or apply the listed mitigation; fragrouter: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2002-2049 being exploited?

CVE-2002-2049 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-2002-2049 affect?

CVE-2002-2049 affects dsniff, fragroute, fragrouter. Severity is high (CVSS 7.5). configure for Dsniff 2.3, fragroute 1.2, and fragrouter 1.6, when downloaded from monkey.org on May 17, 2002, has been modified to contain a backdoor, which allows remote attackers to access the system.

How urgent is CVE-2002-2049?

Priority 45/100. High severity

Related CVEs

CVE-2003-0850 HIGH 7.5 DOWNGRADE DOWNGRADE The TCP reassembly functionality in libnids before 1.18 allows remote attackers to cause "memory corruption" a

References

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