CVE-2004-2681: PeerSec MatrixSSL before 1.1 caches session keys for an indefinitely long time, which might make it easier for

Q: How do I fix CVE-2004-2681?

matrixssl: upgrade to newer than 1.0. Exact commands for each OS are on this page.

Q: Is CVE-2004-2681 being exploited?

CVE-2004-2681 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-2004-2681 affect?

CVE-2004-2681 affects matrixssl. Severity is high (CVSS 7.5). PeerSec MatrixSSL before 1.1 caches session keys for an indefinitely long time, which might make it easier for remote attackers to hijack a session.

This month

HIGH 7.5UPGRADE

CVE-2004-2681 is a high-severity flaw (CVSS 7.5) affecting matrixssl. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

PeerSec MatrixSSL before 1.1 caches session keys for an indefinitely long time, which might make it easier for remote attackers to hijack a session.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	1.2% (top 33%)
CISA exploited list	No
Published	2004-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: peersec networks

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

Am I affected?

Timeline

2004-12-31 05:00 UTCPublished CVE record published
2026-06-16 22:10 UTCUpdated Record last modified

peersec networks matrixssl UPGRADE

Affected: <= 1.0

Fixed in: newer than 1.0

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 1.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade matrixssl

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade matrixssl

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2004-2681?

matrixssl: upgrade to newer than 1.0. Exact commands for each OS are on this page.

Is CVE-2004-2681 being exploited?

CVE-2004-2681 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-2004-2681 affect?

CVE-2004-2681 affects matrixssl. Severity is high (CVSS 7.5). PeerSec MatrixSSL before 1.1 caches session keys for an indefinitely long time, which might make it easier for remote attackers to hijack a session.

How urgent is CVE-2004-2681?

Priority 43/100. High severity

Related CVEs

CVE-2023-24609 HIGH 7.5 UPGRADE MITIGATE Matrix SSL 4.x through 4.6.0 and Rambus TLS Toolkit have a length-subtraction integer overflow for Client Hell
CVE-2022-46505 HIGH 7.5 UPGRADE An issue in MatrixSSL 4.5.1-open and earlier leads to failure to securely check the SessionID field, resulting
CVE-2022-43974 HIGH 8.1 UPGRADE MatrixSSL 4.0.4 through 4.5.1 has an integer overflow in matrixSslDecodeTls13
CVE-2019-16747 HIGH 7.5 UPGRADE In MatrixSSL before 4.2.2 Open, the DTLS server can encounter an invalid pointer free (leading to memory corru
CVE-2019-14431 CRITICAL 9.8 UPGRADE In MatrixSSL 3.8.3 Open through 4.2.1 Open, the DTLS server mishandles incoming network messages leading to a

References

← Back to latest CVEs