CVE-2005-0667: Buffer overflow in Sylpheed before 1.0.3 and other versions before 1.9.5 allows remote attackers to execute ar

This month

MEDIUM 5.1WATCHLISTDOWNGRADEDOWNGRADEMITIGATE

CVE-2005-0667 is a medium-severity flaw (CVSS 5.1) affecting sylpheed, sylpheed-claws, alt linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in Sylpheed before 1.0.3 and other versions before 1.9.5 allows remote attackers to execute arbitrary code via an e-mail message with certain headers containing non-ASCII characters that are not properly handled when the user replies to the message.

Why this priority

On your watchlist

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

Risk facts

CVSS score	5.1 (Medium)
EPSS exploit chance	3.2% (top 12%)
CISA exploited list	No
Published	2005-03-07
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: altlinux · gentoo · redhat · sylpheed · sylpheed-claws

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

Am I affected?

Timeline

2005-03-07 05:00 UTCPublished CVE record published
2026-06-16 22:11 UTCUpdated Record last modified

sylpheed sylpheed DOWNGRADE

Affected: 0.8.11 · 0.9.4 · 0.9.5 · 0.9.6 · 0.9.7 · 0.9.8 · 0.9.9 · 0.9.10

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.8.11

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.8.11 (Debian / Ubuntu)

apt-cache madison sylpheed sudo apt install sylpheed=<VERSION_BEFORE_0.8.11> sudo apt-mark hold sylpheed

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

dnf --showduplicates list sylpheed sudo dnf downgrade sylpheed-<VERSION_BEFORE_0.8.11> sudo dnf versionlock add sylpheed

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.

sylpheed-claws sylpheed-claws DOWNGRADE

Affected: 1.0.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.2

1. Check installed version

apt-cache policy sylpheed-claws || rpm -q sylpheed-claws || sylpheed-claws --version

2. No fixed release: DOWNGRADE to a release before 1.0.2 (Debian / Ubuntu)

apt-cache madison sylpheed-claws sudo apt install sylpheed-claws=<VERSION_BEFORE_1.0.2> sudo apt-mark hold sylpheed-claws

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

dnf --showduplicates list sylpheed-claws sudo dnf downgrade sylpheed-claws-<VERSION_BEFORE_1.0.2> sudo dnf versionlock add sylpheed-claws

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.

altlinux alt linux MITIGATE

Affected: 2.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.3

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.

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.

redhat enterprise linux MITIGATE

Affected: 2.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.1

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.

redhat fedora core MITIGATE

Affected: core_3.0

Fixed in: no fixed release known

Safe to downgrade to: a release before core_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-2005-0667?

sylpheed: downgrade or apply the listed mitigation; sylpheed-claws: downgrade or apply the listed mitigation; alt linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2005-0667 being exploited?

CVE-2005-0667 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-2005-0667 affect?

CVE-2005-0667 affects sylpheed, sylpheed-claws, alt linux. Severity is medium (CVSS 5.1). Buffer overflow in Sylpheed before 1.0.3 and other versions before 1.9.5 allows remote attackers to execute arbitrary code via an e-mail message with certain headers containing non-ASCII characters that are not properly handled when the use

How urgent is CVE-2005-0667?

Priority 45/100. On your watchlist

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References

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