CVE-2023-46229
Improper Input Validation vulnerability in langchain (PyPI)
What is CVE-2023-46229 About?
This Improper Input Validation vulnerability in Apache Tomcat affects versions from 8.5.0 through 8.5.95 and others, enabling request smuggling when behind a reverse proxy. It occurs due to incorrect parsing of HTTP trailer headers, causing a single request to be treated as multiple requests. Exploitation can be complex, requiring specific network configurations and reverse proxy setups.
Affected Software
- langchain
- <9ecb7240a480720ec9d739b3877a52f76098a2b8
- <0.0.317
Technical Details
The vulnerability in Apache Tomcat (versions 8.5.0-8.5.95, 9.0.0-M1-9.0.82, 10.1.0-M1-10.1.15, 11.0.0-M1-11.0.0-M10) stems from improper input validation related to HTTP trailer headers. Specifically, Tomcat fails to correctly parse trailer headers that exceed the configured header size limit. When such a malformed trailer header is encountered, Tomcat may misinterpret a single HTTP request as multiple distinct requests. This misinterpretation becomes critical when Tomcat is deployed behind a reverse proxy. The reverse proxy might forward the seemingly single request, but Tomcat internally dissects it into multiple, potentially leading to request smuggling. This allows an attacker to inject arbitrary requests that bypass the reverse proxy's security mechanisms or cause it to mishandle subsequent legitimate requests.
What is the Impact of CVE-2023-46229?
Successful exploitation may allow attackers to bypass security controls, access unauthorized resources, cache malicious content, or interfere with other users' sessions, leading to data exposure or further attacks.
What is the Exploitability of CVE-2023-46229?
Exploitation of this request smuggling vulnerability is complex, as it requires specific conditions related to HTTP trailer header size and the deployment of Tomcat behind a reverse proxy. Attackers need to craft requests that exploit the discrepancy in how the reverse proxy and Tomcat handle excessive trailer headers. There are no explicit authentication or privilege requirements to trigger the vulnerability, as it relies on malformed HTTP request structures. It can be exploited remotely. Key risk factors include the use of vulnerable Tomcat versions in conjunction with a reverse proxy, especially if the proxy's and Tomcat's header processing limits or interpretations differ significantly. An attacker would need to understand the network topology and header processing mechanisms to succeed.
What are the Known Public Exploits?
| PoC Author | Link | Commentary |
|---|---|---|
| No known exploits | ||
What are the Available Fixes for CVE-2023-46229?
Available Upgrade Options
- langchain
- <0.0.317 → Upgrade to 0.0.317
- langchain
- <9ecb7240a480720ec9d739b3877a52f76098a2b8 → Upgrade to 9ecb7240a480720ec9d739b3877a52f76098a2b8
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Book a demoAdditional Resources
- https://github.com/langchain-ai/langchain/commit/9ecb7240a480720ec9d739b3877a52f76098a2b8
- https://github.com/langchain-ai/langchain/pull/11925
- https://github.com/pypa/advisory-database/tree/main/vulns/langchain/PYSEC-2023-205.yaml
- https://github.com/langchain-ai/langchain/commit/9ecb7240a480720ec9d739b3877a52f76098a2b8
- https://nvd.nist.gov/vuln/detail/CVE-2023-46229
- https://osv.dev/vulnerability/GHSA-655w-fm8m-m478
- https://github.com/langchain-ai/langchain
- https://github.com/langchain-ai/langchain/commit/9ecb7240a480720ec9d739b3877a52f76098a2b8
- https://github.com/langchain-ai/langchain/pull/11925
What are Similar Vulnerabilities to CVE-2023-46229?
Similar Vulnerabilities: CVE-2023-46877 , CVE-2023-46083 , CVE-2023-37900 , CVE-2023-37286 , CVE-2023-37285
