CVE-2002-0082: The dbm and shm session cache code in mod_ssl before 2.8.7-1.3.23, and Apache-SSL before 1.3.22+1.46, does not

Q: How do I fix CVE-2002-0082?

apache-ssl: downgrade or apply the listed mitigation; mod ssl: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2002-0082 being exploited?

CVE-2002-0082 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2002-0082 affect?

CVE-2002-0082 affects apache-ssl, mod ssl. Severity is high (CVSS 7.5). The dbm and shm session cache code in mod_ssl before 2.8.7-1.3.23, and Apache-SSL before 1.3.22+1.46, does not properly initialize memory using the i2d_SSL_SESSION function, which allows remote attackers to use a buffer overflow to execute

Q: How urgent is CVE-2002-0082?

Priority 61/100. High severity; EPSS top 2%: very likely to be exploited; Public exploit reference; On your watchlist

This week

HIGH 7.5WATCHLISTDOWNGRADEDOWNGRADE

CVE-2002-0082 is a high-severity flaw (CVSS 7.5) affecting apache-ssl, mod ssl. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The dbm and shm session cache code in mod_ssl before 2.8.7-1.3.23, and Apache-SSL before 1.3.22+1.46, does not properly initialize memory using the i2d_SSL_SESSION function, which allows remote attackers to use a buffer overflow to execute arbitrary code via a large client certificate that is signed by a trusted Certificate Authority (CA), which produces a large serialized session.

Why this priority

High severity
EPSS top 2%: very likely to be exploited
Public exploit reference
On your watchlist

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

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	29.7% (top 2%)
CISA exploited list	No
Published	2002-03-15
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: apache-ssl · mod ssl

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

Am I affected?

Timeline

2002-03-15 05:00 UTCPublished CVE record published
2026-06-16 21:56 UTCUpdated Record last modified

apache-ssl apache-ssl DOWNGRADE

Affected: 1.40 · 1.41 · 1.42 · 1.44 · 1.45 · 1.46

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.40

1. Check installed version

apt-cache policy apache-ssl || rpm -q apache-ssl || apache-ssl --version

2. No fixed release: DOWNGRADE to a release before 1.40 (Debian / Ubuntu)

apt-cache madison apache-ssl sudo apt install apache-ssl=<VERSION_BEFORE_1.40> sudo apt-mark hold apache-ssl

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

dnf --showduplicates list apache-ssl sudo dnf downgrade apache-ssl-<VERSION_BEFORE_1.40> sudo dnf versionlock add apache-ssl

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.

mod ssl mod ssl DOWNGRADE

Affected: 2.7.1 · 2.8 · 2.8.1 · 2.8.2 · 2.8.3 · 2.8.4 · 2.8.5 · 2.8.6

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.7.1

1. Check installed version

apt-cache policy mod-ssl || rpm -q mod-ssl || mod-ssl --version

2. No fixed release: DOWNGRADE to a release before 2.7.1 (Debian / Ubuntu)

apt-cache madison mod-ssl sudo apt install mod-ssl=<VERSION_BEFORE_2.7.1> sudo apt-mark hold mod-ssl

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

dnf --showduplicates list mod-ssl sudo dnf downgrade mod-ssl-<VERSION_BEFORE_2.7.1> sudo dnf versionlock add mod-ssl

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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: Apache mod_ssl < 2.8.7 OpenSSL - 'OpenFuck.c' Remote Buffer Overflow
Exploit-DB: Apache mod_ssl < 2.8.7 OpenSSL - 'OpenFuckV2.c' Remote Buffer Overflow (1)
Exploit-DB: Apache mod_ssl < 2.8.7 OpenSSL - 'OpenFuckV2.c' Remote Buffer Overflow (2)

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-2002-0082?

apache-ssl: downgrade or apply the listed mitigation; mod ssl: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2002-0082 being exploited?

CVE-2002-0082 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-2002-0082 affect?

CVE-2002-0082 affects apache-ssl, mod ssl. Severity is high (CVSS 7.5). The dbm and shm session cache code in mod_ssl before 2.8.7-1.3.23, and Apache-SSL before 1.3.22+1.46, does not properly initialize memory using the i2d_SSL_SESSION function, which allows remote attackers to use a buffer overflow to execute

How urgent is CVE-2002-0082?

Priority 61/100. High severity; EPSS top 2%: very likely to be exploited; Public exploit reference; On your watchlist

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References

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