CVE-2019-16215

CVSS V2 Medium 4 CVSS V3 Medium 6.5
Description
The Markdown parser in Zulip server before 2.0.5 used a regular expression vulnerable to exponential backtracking. A user who is logged into the server could send a crafted message causing the server to spend an effectively arbitrary amount of CPU time and stall the processing of future messages.
Overview
  • CVE ID
  • CVE-2019-16215
  • Assigner
  • cve@mitre.org
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2019-09-18T12:15:10
  • Last Modified Date
  • 2019-09-18T18:27:18
Weakness Enumerations
CWE URL
CWE-400 http://cwe.mitre.org/data/definitions/400.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:zulip:zulip_server:*:*:*:*:*:*:*:* 1 OR 2.0.5
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:L/Au:S/C:N/I:N/A:P
  • Access Vector
  • NETWORK
  • Access Compatibility
  • LOW
  • Authentication
  • SINGLE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • NONE
  • Availability Impact
  • PARTIAL
  • Base Score
  • 4
  • Severity
  • MEDIUM
  • Exploitability Score
  • 8
  • Impact Score
  • 2.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • LOW
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • HIGH
  • Base Score
  • 6.5
  • Base Severity
  • MEDIUM
  • Exploitability Score
  • 2.8
  • Impact Score
  • 3.6
References
Reference URL Reference Tags
https://blog.zulip.org/2019/09/11/zulip-server-2-0-5-security-release/ Vendor Advisory
https://github.com/zulip/zulip/commit/5797f013b3be450c146a4141514bda525f2f1b51 Patch Third Party Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2019-16215
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-16215
History
Created Old Value New Value Data Type Notes
2022-05-10 07:46:04 Added to TrackCVE
2022-12-04 02:54:03 2019-09-18T12:15Z 2019-09-18T12:15:10 CVE Published Date updated
2022-12-04 02:54:03 2019-09-18T18:27:18 CVE Modified Date updated
2022-12-04 02:54:03 Analyzed Vulnerability Status updated