CVE-2004-0770: romload.c in DGen Emulator 1.23 and earlier allows local users to overwrite arbitrary files via a symlink atta

Routine

LOW 2.1WATCHLISTDOWNGRADEMITIGATE

CVE-2004-0770 is a low-severity flaw (CVSS 2.1) affecting emulator, debian linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

romload.c in DGen Emulator 1.23 and earlier allows local users to overwrite arbitrary files via a symlink attack on temporary files during decompression of (1) gzip or (2) bzip ROM files.

Why this priority

On your watchlist

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	2005-01-10
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: debian · dgen

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

Am I affected?

Timeline

2005-01-10 05:00 UTCPublished CVE record published
2026-06-16 22:06 UTCUpdated Record last modified

dgen emulator DOWNGRADE

Affected: 1.15 · 1.16 · 1.17 · 1.18 · 1.20 · 1.20_a · 1.21 · 1.22

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.15

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.15 (Debian / Ubuntu)

apt-cache madison emulator sudo apt install emulator=<VERSION_BEFORE_1.15> sudo apt-mark hold emulator

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

dnf --showduplicates list emulator sudo dnf downgrade emulator-<VERSION_BEFORE_1.15> sudo dnf versionlock add emulator

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.

debian debian linux MITIGATE

Affected: 3.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.0

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-2004-0770?

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

Is CVE-2004-0770 being exploited?

CVE-2004-0770 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-2004-0770 affect?

CVE-2004-0770 affects emulator, debian linux. Severity is low (CVSS 2.1). romload.c in DGen Emulator 1.23 and earlier allows local users to overwrite arbitrary files via a symlink attack on temporary files during decompression of (1) gzip or (2) bzip ROM files.

How urgent is CVE-2004-0770?

Priority 19/100. On your watchlist

Software pages

Debian vulnerabilities

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References

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