CVE-2005-1121: Format string vulnerability in the my_xlog function in lib.c for Oops! Proxy Server 1.5.23 and earlier, as cal

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MEDIUM 5.0WATCHLISTDOWNGRADEMITIGATE

CVE-2005-1121 is a medium-severity flaw (CVSS 5.0) affecting oops proxy server, linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Format string vulnerability in the my_xlog function in lib.c for Oops! Proxy Server 1.5.23 and earlier, as called by the auth functions in the passwd_mysql and passwd_pgsql modules, may allow attackers to execute arbitrary code via a URL.

Why this priority

Public exploit reference
On your watchlist

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	2.3% (top 17%)
CISA exploited list	No
Published	2005-05-02
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: gentoo · igor khasilev

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

Am I affected?

Timeline

2005-05-02 04:00 UTCPublished CVE record published
2026-06-16 22:12 UTCUpdated Record last modified

igor khasilev oops proxy server DOWNGRADE

Affected: 1.4.22 · 1.5.19 · 1.5.53

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.

gentoo linux MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2005-1121?

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

Is CVE-2005-1121 being exploited?

CVE-2005-1121 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-2005-1121 affect?

CVE-2005-1121 affects oops proxy server, linux. Severity is medium (CVSS 5.0). Format string vulnerability in the my_xlog function in lib.c for Oops! Proxy Server 1.5.23 and earlier, as called by the auth functions in the passwd_mysql and passwd_pgsql modules, may allow attackers to execute arbitrary code via a URL.

How urgent is CVE-2005-1121?

Priority 48/100. Public exploit reference; On your watchlist

Software pages

MySQL vulnerabilities

Related CVEs

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
CVE-2001-0028 HIGH 10.0 DOWNGRADE Buffer overflow in the HTML parsing code in oops WWW proxy server 1.5.2 and earlier allows remote attackers to

References

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