CVE-2011-1720: n/a vulnerability

CVE-2011-1720: The SMTP server in Postfix before 2.5.13, 2.6.x before 2.6.10, 2.7.x before 2.7.4, and 2.8.x before 2.8.3,...

The SMTP server in Postfix before 2.5.13, 2.6.x before 2.6.10, 2.7.x before 2.7.4, and 2.8.x before 2.8.3, when certain Cyrus SASL authentication methods are enabled, does not create a new server handle after client authentication fails, which allows remote attackers to cause a denial of service (heap memory corruption and daemon crash) or possibly execute arbitrary code via an invalid AUTH command with one method followed by an AUTH command with a different method.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 22:37 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2011-1720 affects Postfix SMTP servers using certain Cyrus SASL authentication methods. A remote attacker could crash the mail daemon through malformed authentication handling, disrupting email service. The public record also notes possible arbitrary code execution, but the supplied sources do not confirm active exploitation. Exposure is most likely on internet-facing Postfix SMTP servers running vulnerable versions with Cyrus SASL authentication enabled. Systems using distribution backports need package advisory verification, not only upstream version comparison. Treat as a high-priority legacy mail infrastructure issue if vulnerable Postfix is still deployed. The main business risk is email outage, with possible code execution noted but not proven in the supplied evidence. Mitigation focus: Upgrade Postfix to 2.5.13, 2.6.10, 2.7.4, 2.8.3, or later.; Apply the relevant Linux distribution security update or confirmed backport.; Check vendor guidance before changing Cyrus SASL authentication configuration..

Prepared: Jun 24, 2026, 13:28 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: May 13, 2011, 17:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

3Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
https://bugzilla.redhat.com/show_bug.cgi?id=699035CVE reference · x_refsource_CONFIRM
postfix-cyrus-sasl-code-exec(67359)CVE reference · vdb-entry, x_refsource_XF

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

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Weakness

CWE details

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