Service interruption via repeated unanchored regex scans
Published Sep 27, 2024 · Updated Sep 27, 2024
Regular expression denial of service in Langflow 1.0.18 and earlier allows remote authenticated users to interrupt the service. The extract_input_variables_from_prompt function repeatedly applies an unanchored brace-matching regex and splices each match from remaining_text, forcing repeated scans of attacker-controlled prompt text. A crafted HTTP POST body can consume excessive CPU; authenticated access to the request handler is required, and no data disclosure or modification is reported.
Summary
What happened
Regular expression denial of service in Langflow 1.0.18 and earlier allows remote authenticated users to interrupt the service. The extract_input_variables_from_prompt function repeatedly applies an unanchored brace-matching regex and splices each match from remaining_text, forcing repeated scans of attacker-controlled prompt text. A crafted HTTP POST body can consume excessive CPU; authenticated access to the request handler is required, and no data disclosure or modification is reported.
The record
- CVE
- CVE-2024-9277
- Published
- Sep 27, 2024
- Updated
- Sep 27, 2024
- Vendor
- Langflow
- Product
- Langflow
- Classifications
- CWE-1333, T1499.004
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 27, 2024CVE publishedPublication date reported by the CVE source.
- Sep 27, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=1.0.0
- Affected versionversion=1.0.0 <=1.0.18
- Affected versionversion=1.0.1
- Affected versionversion=1.0.10
- Affected versionversion=1.0.11
- Affected versionversion=1.0.12
- Affected versionversion=1.0.13
- Affected versionversion=1.0.14
- Affected versionversion=1.0.15
- Affected versionversion=1.0.16
- Affected versionversion=1.0.17
- Affected versionversion=1.0.18
- Affected versionversion=1.0.2
- Affected versionversion=1.0.3
- Affected versionversion=1.0.4
- Affected versionversion=1.0.5
- Affected versionversion=1.0.6
- Affected versionversion=1.0.7
- Affected versionversion=1.0.8
- Affected versionversion=1.0.9
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Remote ReDoS in Langflowproof of concept · unverified
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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