CVE-2002-0872: l2tpd 0.67 does not initialize the random number generator, which allows remote attackers to hijack sessions.

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HIGH 7.5DOWNGRADE

CVE-2002-0872 is a high-severity flaw (CVSS 7.5) affecting l2tpd. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

l2tpd 0.67 does not initialize the random number generator, which allows remote attackers to hijack sessions.

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	2002-09-05
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: l2tpd

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

Am I affected?

Timeline

2002-09-05 04:00 UTCPublished CVE record published
2026-06-16 21:58 UTCUpdated Record last modified

l2tpd l2tpd DOWNGRADE

Affected: 0.62 · 0.63 · 0.64 · 0.65 · 0.66 · 0.67

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.62

1. Check installed version

apt-cache policy l2tpd || rpm -q l2tpd || l2tpd --version

2. No fixed release: DOWNGRADE to a release before 0.62 (Debian / Ubuntu)

apt-cache madison l2tpd sudo apt install l2tpd=<VERSION_BEFORE_0.62> sudo apt-mark hold l2tpd

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

dnf --showduplicates list l2tpd sudo dnf downgrade l2tpd-<VERSION_BEFORE_0.62> sudo dnf versionlock add l2tpd

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-2002-0872?

l2tpd: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2002-0872 being exploited?

CVE-2002-0872 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-2002-0872 affect?

CVE-2002-0872 affects l2tpd. Severity is high (CVSS 7.5). l2tpd 0.67 does not initialize the random number generator, which allows remote attackers to hijack sessions.

How urgent is CVE-2002-0872?

Priority 45/100. High severity

Related CVEs

CVE-2004-0649 HIGH 10.0 DOWNGRADE MITIGATE Buffer overflow in write_packet in control.c for l2tpd may allow remote attackers to execute arbitrary code.
CVE-2002-0873 MEDIUM 5.0 DOWNGRADE Vulnerability in l2tpd 0.67 allows remote attackers to overwrite the vendor field via a long value in an attri

References

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