CVE-2002-0133: Buffer overflows in Avirt Gateway Suite 4.2 allow remote attackers to cause a denial of service and possibly e

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HIGH 7.5DOWNGRADEDOWNGRADEDOWNGRADE

CVE-2002-0133 is a high-severity flaw (CVSS 7.5) affecting avirt gateway, avirt gateway suite, avirt soho. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflows in Avirt Gateway Suite 4.2 allow remote attackers to cause a denial of service and possibly execute arbitrary code via (1) long header fields to the HTTP proxy, or (2) a long string to the telnet proxy.

Why this priority

High severity
EPSS top 8%: very likely to be exploited

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

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	4.9% (top 8%)
CISA exploited list	No
Published	2002-03-25
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: avirt

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

Am I affected?

Timeline

2002-03-25 05:00 UTCPublished CVE record published
2026-06-16 21:56 UTCUpdated Record last modified

avirt avirt gateway DOWNGRADE

Affected: 4.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.2

1. Check installed version

apt-cache policy avirt-gateway || rpm -q avirt-gateway || avirt-gateway --version

2. No fixed release: DOWNGRADE to a release before 4.2 (Debian / Ubuntu)

apt-cache madison avirt-gateway sudo apt install avirt-gateway=<VERSION_BEFORE_4.2> sudo apt-mark hold avirt-gateway

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

dnf --showduplicates list avirt-gateway sudo dnf downgrade avirt-gateway-<VERSION_BEFORE_4.2> sudo dnf versionlock add avirt-gateway

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.

avirt avirt gateway suite DOWNGRADE

Affected: 4.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.2

1. Check installed version

apt-cache policy avirt-gateway-suite || rpm -q avirt-gateway-suite || avirt-gateway-suite --version

2. No fixed release: DOWNGRADE to a release before 4.2 (Debian / Ubuntu)

apt-cache madison avirt-gateway-suite sudo apt install avirt-gateway-suite=<VERSION_BEFORE_4.2> sudo apt-mark hold avirt-gateway-suite

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

dnf --showduplicates list avirt-gateway-suite sudo dnf downgrade avirt-gateway-suite-<VERSION_BEFORE_4.2> sudo dnf versionlock add avirt-gateway-suite

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.

avirt avirt soho DOWNGRADE

Affected: 4.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.2

1. Check installed version

apt-cache policy avirt-soho || rpm -q avirt-soho || avirt-soho --version

2. No fixed release: DOWNGRADE to a release before 4.2 (Debian / Ubuntu)

apt-cache madison avirt-soho sudo apt install avirt-soho=<VERSION_BEFORE_4.2> sudo apt-mark hold avirt-soho

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

dnf --showduplicates list avirt-soho sudo dnf downgrade avirt-soho-<VERSION_BEFORE_4.2> sudo dnf versionlock add avirt-soho

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-2002-0133?

avirt gateway: downgrade or apply the listed mitigation; avirt gateway suite: downgrade or apply the listed mitigation; avirt soho: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2002-0133 being exploited?

CVE-2002-0133 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-2002-0133 affect?

CVE-2002-0133 affects avirt gateway, avirt gateway suite, avirt soho. Severity is high (CVSS 7.5). Buffer overflows in Avirt Gateway Suite 4.2 allow remote attackers to cause a denial of service and possibly execute arbitrary code via (1) long header fields to the HTTP proxy, or (2) a long string to the telnet proxy.

How urgent is CVE-2002-0133?

Priority 49/100. High severity; EPSS top 8%: very likely to be exploited

References

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