CVE-2001-0028: Buffer overflow in the HTML parsing code in oops WWW proxy server 1.5.2 and earlier allows remote attackers to

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HIGH 10.0DOWNGRADE

CVE-2001-0028 is a high-severity flaw (CVSS 10.0) affecting oops proxy server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in the HTML parsing code in oops WWW proxy server 1.5.2 and earlier allows remote attackers to execute arbitrary commands via a large number of " (quotation) characters.

Why this priority

Critical severity
EPSS top 6%: 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	7.1% (top 6%)
CISA exploited list	No
Published	2001-02-12
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: igor khasilev

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

Am I affected?

Timeline

2001-02-12 05:00 UTCPublished CVE record published
2026-06-16 21:53 UTCUpdated Record last modified

igor khasilev oops proxy server DOWNGRADE

Affected: 1.4.22

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.4.22

1. Check installed version

apt-cache policy oops-proxy-server || rpm -q oops-proxy-server || oops-proxy-server --version

2. No fixed release: DOWNGRADE to a release before 1.4.22 (Debian / Ubuntu)

apt-cache madison oops-proxy-server sudo apt install oops-proxy-server=<VERSION_BEFORE_1.4.22> sudo apt-mark hold oops-proxy-server

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

dnf --showduplicates list oops-proxy-server sudo dnf downgrade oops-proxy-server-<VERSION_BEFORE_1.4.22> sudo dnf versionlock add oops-proxy-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: Oops Proxy Server 1.4.22 - Remote Buffer Overflow (2)
Exploit-DB: Oops Proxy Server 1.4.22 - Remote Buffer Overflow (1)

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-2001-0028?

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

Is CVE-2001-0028 being exploited?

CVE-2001-0028 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-2001-0028 affect?

CVE-2001-0028 affects oops proxy server. Severity is high (CVSS 10.0). Buffer overflow in the HTML parsing code in oops WWW proxy server 1.5.2 and earlier allows remote attackers to execute arbitrary commands via a large number of " (quotation) characters.

How urgent is CVE-2001-0028?

Priority 64/100. Critical severity; EPSS top 6%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2005-1121 MEDIUM 5.0 DOWNGRADE MITIGATE Format string vulnerability in the my_xlog function in lib.c for Oops! Proxy Server 1.5.23 and earlier, as cal
CVE-2001-0029 HIGH 10.0 DOWNGRADE Buffer overflow in oops WWW proxy server 1.4.6 (and possibly other versions) allows remote attackers to execut

References

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