CVE-2011-3350: masqmail 0.2.21 through 0.2.30 improperly calls seteuid() in src/log.c and src/masqmail.c that results in impr

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CRITICAL 9.8REMOTEUPGRADE

CVE-2011-3350 is a critical-severity flaw (CVSS 9.8) affecting masqmail. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

masqmail 0.2.21 through 0.2.30 improperly calls seteuid() in src/log.c and src/masqmail.c that results in improper privilege dropping.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

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	1.7% (top 23%)
CISA exploited list	No
Weakness	CWE-273
Published	2019-11-19
Last modified	2026-06-16

Publisher (CNA): Red Hat, Inc. · Vendor: marmaro

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

Am I affected?

Timeline

2019-11-19 23:15 UTCPublished CVE record published
2026-06-16 23:33 UTCUpdated Record last modified

marmaro masqmail UPGRADE

Affected: >= 0.2.21 and <= 0.2.30

Fixed in: newer than 0.2.30

Safe to downgrade to: a release before 0.2.21

1. Check installed version

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

2. UPGRADE to newer than 0.2.30 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade masqmail

Note

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

3. If no update is available yet, DOWNGRADE to a release before 0.2.21 (Debian / Ubuntu)

apt-cache madison masqmail sudo apt install masqmail=<VERSION_BEFORE_0.2.21> sudo apt-mark hold masqmail

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list masqmail sudo dnf downgrade masqmail-<VERSION_BEFORE_0.2.21> sudo dnf versionlock add masqmail

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-2011-3350?

masqmail: upgrade to newer than 0.2.30. Exact commands for each OS are on this page.

Is CVE-2011-3350 being exploited?

CVE-2011-3350 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-2011-3350 affect?

CVE-2011-3350 affects masqmail. Severity is critical (CVSS 9.8). masqmail 0.2.21 through 0.2.30 improperly calls seteuid() in src/log.c and src/masqmail.c that results in improper privilege dropping.

How urgent is CVE-2011-3350?

Priority 59/100. Critical severity; Remotely exploitable, no login, no user action

References

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