SB2018041816 - Multiple vulnerabilities in Zulip Server

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Main Vulnerability Database SB2018041816

SB2018041816 - Multiple vulnerabilities in Zulip Server

Published: April 18, 2018 Updated: May 17, 2018

Security Bulletin ID SB2018041816
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 4
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 4 vulnerabilities.


1) Cross-site scripting (CVE-ID: CVE-2018-9999)

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear


Vulnerability allows a remote attacker to perform XSS attacks.

The vulnerability is caused by an input validation error related to user uploads and the (default) LOCAL_UPLOADS_DIR storage backend. A remote attacker can create a specially specially crafted web page, trick the victim intop opening it and execute arbitrary HTML and script code in victim's browser.


2) Cross-site scripting (CVE-ID: CVE-2018-9990)

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear


Vulnerability allows a remote attacker to perform XSS attacks.

The vulnerability is caused by an input validation error related to stream names in topic typeahead. A remote attacker can create a specially specially crafted web page, trick the victim intop opening it and execute arbitrary HTML and script code in victim's browser.


3) Cross-site scripting (CVE-ID: CVE-2018-9987)

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear


Vulnerability allows a remote attacker to perform XSS attacks.

The vulnerability is caused by an input validation error related to muting notifications. A remote attacker can create a specially specially crafted web page, trick the victim intop opening it and execute arbitrary HTML and script code in victim's browser.


4) Cross-site scripting (CVE-ID: CVE-2018-9986)

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear


Vulnerability allows a remote attacker to perform XSS attacks.

The vulnerability is caused by an input validation error related to the frontend markdown processor. A remote attacker can create a specially specially crafted web page, trick the victim intop opening it and execute arbitrary HTML and script code in victim's browser.


Remediation

Install update from vendor's website.

References