// For flags

CVE-2019-11356

cyrus-imapd: buffer overflow in CalDAV request handling triggered by a long iCalendar property name

Severity Score

9.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

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.

La función CalDAV en httpd en Cyrus IMAP 2.5.x a 2.5.12 y 3.0.x a 3.0.9 permite a los atacantes remotos ejecutar código arbitrario a través de una operación HTTP PUT diseñada para un evento con un nombre de propiedad largo de iCalendar.

A flaw was found in the CalDAV feature in httpd in Cyrus IMAP. This flaw allows a remote attacker to execute arbitrary code via a crafted HTTP PUT operation for an event with a long iCalendar property name.

It was discovered that Cyrus IMAP Server could execute arbitrary code via a crafted HTTP PUT operation for an event with a long iCalendar property name. An attacker could use this vulnerability to cause a crash or possibly execute arbitrary code. It was discovered that the Cyrus IMAP Server allow users to create any mailbox with administrative privileges. A local attacker could use this to obtain sensitive information. Various other issues were also addressed.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2019-04-19 CVE Reserved
  • 2019-06-03 CVE Published
  • 2024-08-04 CVE Updated
  • 2025-03-30 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer
  • CWE-787: Out-of-bounds Write
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Cyrus
Search vendor "Cyrus"
 Imap
Search vendor "Cyrus" for product "Imap"
 >= 2.5.0 <= 2.5.12
Search vendor "Cyrus" for product "Imap" and version " >= 2.5.0 <= 2.5.12"
-
Affected
Cyrus
Search vendor "Cyrus"
 Imap
Search vendor "Cyrus" for product "Imap"
 >= 3.0.0 <= 3.0.9
Search vendor "Cyrus" for product "Imap" and version " >= 3.0.0 <= 3.0.9"
-
Affected
Fedoraproject
Search vendor "Fedoraproject"
 Fedora
Search vendor "Fedoraproject" for product "Fedora"
 29
Search vendor "Fedoraproject" for product "Fedora" and version "29"
-
Affected
Fedoraproject
Search vendor "Fedoraproject"
 Fedora
Search vendor "Fedoraproject" for product "Fedora"
 30
Search vendor "Fedoraproject" for product "Fedora" and version "30"
-
Affected
Debian
Search vendor "Debian"
 Debian Linux
Search vendor "Debian" for product "Debian Linux"
 9.0
Search vendor "Debian" for product "Debian Linux" and version "9.0"
-
Affected
Canonical
Search vendor "Canonical"
 Ubuntu Linux
Search vendor "Canonical" for product "Ubuntu Linux"
 18.04
Search vendor "Canonical" for product "Ubuntu Linux" and version "18.04"
lts
Affected
Redhat
Search vendor "Redhat"
 Enterprise Linux
Search vendor "Redhat" for product "Enterprise Linux"
 8.0
Search vendor "Redhat" for product "Enterprise Linux" and version "8.0"
-
Affected
Redhat
Search vendor "Redhat"
 Enterprise Linux Eus
Search vendor "Redhat" for product "Enterprise Linux Eus"
 8.1
Search vendor "Redhat" for product "Enterprise Linux Eus" and version "8.1"
-
Affected
Redhat
Search vendor "Redhat"
 Enterprise Linux Eus
Search vendor "Redhat" for product "Enterprise Linux Eus"
 8.2
Search vendor "Redhat" for product "Enterprise Linux Eus" and version "8.2"
-
Affected
Redhat
Search vendor "Redhat"
 Enterprise Linux Eus
Search vendor "Redhat" for product "Enterprise Linux Eus"
 8.4
Search vendor "Redhat" for product "Enterprise Linux Eus" and version "8.4"
-
Affected
Redhat
Search vendor "Redhat"
 Enterprise Linux Server Aus
Search vendor "Redhat" for product "Enterprise Linux Server Aus"
 8.2
Search vendor "Redhat" for product "Enterprise Linux Server Aus" and version "8.2"
-
Affected
Redhat
Search vendor "Redhat"
 Enterprise Linux Server Aus
Search vendor "Redhat" for product "Enterprise Linux Server Aus"
 8.4
Search vendor "Redhat" for product "Enterprise Linux Server Aus" and version "8.4"
-
Affected
Redhat
Search vendor "Redhat"
 Enterprise Linux Server Tus
Search vendor "Redhat" for product "Enterprise Linux Server Tus"
 8.2
Search vendor "Redhat" for product "Enterprise Linux Server Tus" and version "8.2"
-
Affected
Redhat
Search vendor "Redhat"
 Enterprise Linux Server Tus
Search vendor "Redhat" for product "Enterprise Linux Server Tus"
 8.4
Search vendor "Redhat" for product "Enterprise Linux Server Tus" and version "8.4"
-
Affected