CVE-2002-0873: Vulnerability in l2tpd 0.67 allows remote attackers to overwrite the vendor field via a long value in an attri

Routine

MEDIUM 5.0DOWNGRADE

CVE-2002-0873 is a medium-severity flaw (CVSS 5.0) affecting l2tpd. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Vulnerability in l2tpd 0.67 allows remote attackers to overwrite the vendor field via a long value in an attribute/value pair, possibly via a buffer overflow.

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	1.3% (top 30%)
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-2002-0873?

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

Is CVE-2002-0873 being exploited?

CVE-2002-0873 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-2002-0873 affect?

CVE-2002-0873 affects l2tpd. Severity is medium (CVSS 5.0). Vulnerability in l2tpd 0.67 allows remote attackers to overwrite the vendor field via a long value in an attribute/value pair, possibly via a buffer overflow.

How urgent is CVE-2002-0873?

Priority 35/100. No elevated risk signals yet.

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-2002-0872 HIGH 7.5 DOWNGRADE l2tpd 0.67 does not initialize the random number generator, which allows remote attackers to hijack sessions.

References

← Back to latest CVEs