CVE-2004-2440: Unspecified vulnerability in cmdline.c in proxytunnel 1.1.3 and earlier allows local users to obtain proxy cre

Routine

LOW 2.1DOWNGRADE

CVE-2004-2440 is a low-severity flaw (CVSS 2.1) affecting proxytunnel. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Unspecified vulnerability in cmdline.c in proxytunnel 1.1.3 and earlier allows local users to obtain proxy credentials (username or password) of other users.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	2.1 (Low)
EPSS exploit chance	0.3% (top 72%)
CISA exploited list	No
Published	2004-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: proxytunnel

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 22:09 UTCUpdated Record last modified

proxytunnel proxytunnel DOWNGRADE

Affected: 1.0.6 · 1.1.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.6

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.0.6 (Debian / Ubuntu)

apt-cache madison proxytunnel sudo apt install proxytunnel=<VERSION_BEFORE_1.0.6> sudo apt-mark hold proxytunnel

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

dnf --showduplicates list proxytunnel sudo dnf downgrade proxytunnel-<VERSION_BEFORE_1.0.6> sudo dnf versionlock add proxytunnel

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.

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-2004-2440?

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

Is CVE-2004-2440 being exploited?

CVE-2004-2440 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-2004-2440 affect?

CVE-2004-2440 affects proxytunnel. Severity is low (CVSS 2.1). Unspecified vulnerability in cmdline.c in proxytunnel 1.1.3 and earlier allows local users to obtain proxy credentials (username or password) of other users.

How urgent is CVE-2004-2440?

Priority 14/100. No elevated risk signals yet.

Related CVEs

CVE-2004-0992 HIGH 10.0 DOWNGRADE Format string vulnerability in the -a option (daemon mode) in Proxytunnel before 1.2.3 allows remote attackers

References

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