CVE & CISA-KEV Catalog

CVE-2019-11356

CRITICALEPSS 94th pctl

9.8

CVSS v3

Description

The CalDAV feature in httpd in Cyrus IMAP 2.5.x through 2.5.12 and 3.0.x through 3.0.9 allows remote attackers to execute arbitrary code via a crafted HTTP PUT operation for an event with a long iCalendar property name.

CWE-787Out-of-bounds Write

How to fix

Remediation Available

cyrus-imapdDebian

Fixed in:3.0.8-6CVE-2019-11356

Fixed in:3.0.8-6CVE-2019-11356

Fixed in:3.0.8-6CVE-2019-11356

Fixed in:3.0.8-6CVE-2019-11356

cyrus-adminUbuntu

Fixed in:2.5.10-3ubuntu1.1USN-4566-1

cyrus-caldavUbuntu

Fixed in:2.5.10-3ubuntu1.1USN-4566-1

cyrus-commonUbuntu

Fixed in:2.5.10-3ubuntu1.1USN-4566-1

cyrus-imapdUbuntu

Fixed in:2.5.10-3ubuntu1.1USN-4566-1

cyrus-replicationUbuntu

Fixed in:2.5.10-3ubuntu1.1USN-4566-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

7.62%probability of exploitation in 30 days

94thpercentile

High risk: more likely to be exploited than 94% of all known CVEs.

References

Vendor Advisory4

Third-Party Advisory4

Other references2

Related Vulnerabilities

Other CWE-787 (Out-of-bounds Write) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-22457	Critical	9.0	100%	KEV + Ransom	Fix
CVE-2025-0282	Critical	9.0	100%	KEV + Ransom	-
CVE-2015-3113	Critical	9.8	100%	KEV	Fix
CVE-2021-20038	Critical	9.8	100%	KEV + Ransom	-
CVE-2023-4863	High	8.8	100%	KEV	Fix
CVE-2020-16040	Medium	6.5	100%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.