CVE-2010-0359: Buffer overflow in the SSLv2 support in Zeus Web Server before 4.3r5 allows remote attackers to cause a denial

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HIGH 10.0DOWNGRADE

CVE-2010-0359 is a high-severity flaw (CVSS 10.0) affecting zeus web server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in the SSLv2 support in Zeus Web Server before 4.3r5 allows remote attackers to cause a denial of service (daemon crash) or possibly execute arbitrary code via a long string in an invalid Client Hello message.

Why this priority

Critical severity
EPSS top 3%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	10.0 (High)
EPSS exploit chance	20.0% (top 3%)
CISA exploited list	No
Weakness	CWE-119
Published	2010-01-20
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: zeus

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

Am I affected?

Timeline

2010-01-20 16:30 UTCPublished CVE record published
2026-06-16 23:15 UTCUpdated Record last modified

zeus zeus web server DOWNGRADE

Affected: 4.3r5

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.3r5

1. Check installed version

apt-cache policy zeus-web-server || rpm -q zeus-web-server || zeus-web-server --version

2. No fixed release: DOWNGRADE to a release before 4.3r5 (Debian / Ubuntu)

apt-cache madison zeus-web-server sudo apt install zeus-web-server=<VERSION_BEFORE_4.3r5> sudo apt-mark hold zeus-web-server

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

dnf --showduplicates list zeus-web-server sudo dnf downgrade zeus-web-server-<VERSION_BEFORE_4.3r5> sudo dnf versionlock add zeus-web-server

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: Zeus Web Server 4.x - 'SSL2_CLIENT_HELLO' Remote Buffer Overflow (PoC)

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-2010-0359?

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

Is CVE-2010-0359 being exploited?

CVE-2010-0359 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-2010-0359 affect?

CVE-2010-0359 affects zeus web server. Severity is high (CVSS 10.0). Buffer overflow in the SSLv2 support in Zeus Web Server before 4.3r5 allows remote attackers to cause a denial of service (daemon crash) or possibly execute arbitrary code via a long string in an invalid Client Hello message.

How urgent is CVE-2010-0359?

Priority 64/100. Critical severity; EPSS top 3%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2010-0363 LOW 2.6 UPGRADE Cross-site scripting (XSS) vulnerability in Zeus Web Server before 4.3r5, when SSL is enabled for the admin se
CVE-2010-0362 MEDIUM 5.0 UPGRADE Zeus Web Server before 4.3r5 does not use random transaction IDs for DNS requests, which makes it easier for r
CVE-2002-1785 LOW 1.9 DOWNGRADE Cross-site scripting (XSS) vulnerability in Zeus Administration Server in Zeus Web Server 4.0 through 4.1r2 al
CVE-2000-0149 MEDIUM 5.0 DOWNGRADE Zeus web server allows remote attackers to view the source code for CGI programs via a null character (%00) at
CVE-1999-0884 MEDIUM 5.0 DOWNGRADE The Zeus web server administrative interface uses weak encryption for its passwords.

References

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