CVE-2014-8483: The blowfishECB function in core/cipher.cpp in Quassel IRC 0.10.0 allows remote attackers to cause a denial of

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MEDIUM 5.0WATCHLISTMITIGATEMITIGATEDOWNGRADE

CVE-2014-8483 is a medium-severity flaw (CVSS 5.0) affecting ubuntu linux, debian linux, quassel irc. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The blowfishECB function in core/cipher.cpp in Quassel IRC 0.10.0 allows remote attackers to cause a denial of service (out-of-bounds read) via a malformed string.

Why this priority

On your watchlist

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	3.5% (top 11%)
CISA exploited list	No
Weakness	CWE-125
Published	2014-11-06
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: canonical · debian · opensuse · quassel-irc

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2014-11-06 15:55 UTCPublished CVE record published
2026-06-17 00:16 UTCUpdated Record last modified

canonical ubuntu linux MITIGATE

Affected: 12.04

Fixed in: no fixed release known

Safe to downgrade to: a release before 12.04

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.

debian debian linux MITIGATE

Affected: 7.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.0

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.

quassel-irc quassel irc DOWNGRADE

Affected: 0.10.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.10.0

1. Check installed version

apt-cache policy quassel-irc || rpm -q quassel-irc || quassel-irc --version

2. No fixed release: DOWNGRADE to a release before 0.10.0 (Debian / Ubuntu)

apt-cache madison quassel-irc sudo apt install quassel-irc=<VERSION_BEFORE_0.10.0> sudo apt-mark hold quassel-irc

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

dnf --showduplicates list quassel-irc sudo dnf downgrade quassel-irc-<VERSION_BEFORE_0.10.0> sudo dnf versionlock add quassel-irc

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.

opensuse opensuse MITIGATE

Affected: 12.3 · 13.1 · 13.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 12.3

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.

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-2014-8483?

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

Is CVE-2014-8483 being exploited?

CVE-2014-8483 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-2014-8483 affect?

CVE-2014-8483 affects ubuntu linux, debian linux, quassel irc. Severity is medium (CVSS 5.0). The blowfishECB function in core/cipher.cpp in Quassel IRC 0.10.0 allows remote attackers to cause a denial of service (out-of-bounds read) via a malformed string.

How urgent is CVE-2014-8483?

Priority 45/100. On your watchlist

Software pages

Ubuntu vulnerabilities · Debian vulnerabilities

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References

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