CVE-2012-6696: inspircd in Debian before 2.0.7 does not properly handle unsigned integers

Q: How do I fix CVE-2012-6696?

inspircd: upgrade to newer than 2.0.5. Exact commands for each OS are on this page.

Q: Is CVE-2012-6696 being exploited?

CVE-2012-6696 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2012-6696 affect?

CVE-2012-6696 affects inspircd. Severity is critical (CVSS 9.8). inspircd in Debian before 2.0.7 does not properly handle unsigned integers. NOTE: This vulnerability exists because of an incomplete fix to CVE-2012-1836.

Q: How urgent is CVE-2012-6696?

Priority 63/100. Critical severity; Remotely exploitable, no login, no user action; On your watchlist

This week

CRITICAL 9.8REMOTEWATCHLISTUPGRADE

CVE-2012-6696 is a critical-severity flaw (CVSS 9.8) affecting inspircd. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

inspircd in Debian before 2.0.7 does not properly handle unsigned integers. NOTE: This vulnerability exists because of an incomplete fix to CVE-2012-1836.

Why this priority

Critical severity
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.6% (top 24%)
CISA exploited list	No
Weakness	CWE-20
Published	2017-09-25
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: inspircd

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

Am I affected?

Timeline

2017-09-25 21:29 UTCPublished CVE record published
2026-06-16 23:48 UTCUpdated Record last modified

inspircd inspircd UPGRADE

Affected: <= 2.0.5

Fixed in: newer than 2.0.5

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 2.0.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade inspircd

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade inspircd

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2012-6696?

inspircd: upgrade to newer than 2.0.5. Exact commands for each OS are on this page.

Is CVE-2012-6696 being exploited?

CVE-2012-6696 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-2012-6696 affect?

CVE-2012-6696 affects inspircd. Severity is critical (CVSS 9.8). inspircd in Debian before 2.0.7 does not properly handle unsigned integers. NOTE: This vulnerability exists because of an incomplete fix to CVE-2012-1836.

How urgent is CVE-2012-6696?

Priority 63/100. Critical severity; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Debian vulnerabilities

Related CVEs

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CVE-2020-25269 MEDIUM 6.5 UPGRADE MITIGATE An issue was discovered in InspIRCd 2 before 2.0.29 and 3 before 3.6.0
CVE-2019-20918 MEDIUM 6.5 UPGRADE An issue was discovered in InspIRCd 3 before 3.1.0
CVE-2019-20917 MEDIUM 6.5 UPGRADE MITIGATE An issue was discovered in InspIRCd 2 before 2.0.28 and 3 before 3.3.0
CVE-2016-7142 MEDIUM 5.9 UPGRADE MITIGATE The m_sasl module in InspIRCd before 2.0.23, when used with a service that supports SASL_EXTERNAL authenticati

References

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