PT-2020-11925 · Zammad · Zammad

Martin Von Wittich · Published 2020-03-05 · Updated 2021-07-21 · CVE-2020-10101

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Zammad versions 3.0 through 3.2

Description An issue was discovered where the WebSocket server crashes when messages in non-JSON format are sent by an attacker. The message format is not properly checked and parsing errors are not handled, leading to a crash of the service process.

Recommendations For Zammad versions 3.0 through 3.2, as a temporary workaround, consider disabling the WebSocket server until a patch is available. Restrict access to the WebSocket endpoint to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Improper Handling of Exceptional Conditions

RCE

Weakness Enumeration

CWE-755

CWE-20

Related Identifiers

CVE-2020-10101

Affected Products

Zammad

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2020-10101 · Security Note
• https://osv.dev/vulnerability/CVE-2020-10101 · Vendor Advisory
• https://zammad.com/news/security-advisory-zaa-2020-06 · Vendor Advisory
• https://t.me/cvenotify/1346 · Telegram Post