CVE-2024-40642: netty-incubator-co — Exploit

Description

The netty incubator codec.bhttp is a java language binary http parser. In affected versions the `BinaryHttpParser` class does not properly validate input values thus giving attackers almost complete control over the HTTP requests constructed from the parsed output. Attackers can abuse several issues individually to perform various injection attacks including HTTP request smuggling, desync attacks, HTTP header injections, request queue poisoning, caching attacks and Server Side Request Forgery (SSRF). Attacker could also combine several issues to create well-formed messages for other text-based protocols which may result in attacks beyond the HTTP protocol. The BinaryHttpParser class implements the readRequestHead method which performs most of the relevant parsing of the received request. The data structure prefixes values with a variable length integer value. The parsing code below first gets the lengths of the values from the prefixed variable length integer. After it has all of the lengths and calculates all of the indices, the parser casts the applicable slices of the ByteBuf to String. Finally, it passes these values into a new `DefaultBinaryHttpRequest` object where no further parsing or validation occurs. Method is partially validated while other values are not validated at all. Software that relies on netty to apply input validation for binary HTTP data may be vulnerable to various injection and protocol based attacks. This issue has been addressed in version 0.0.13.Final. Users are advised to upgrade. There are no known workarounds for this vulnerability.

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CVSS v3.1 Score

8.1

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-20 Improper Input Validation

Affected Products

Vendor	Product	Versions
netty	netty-incubator-codec-ohttp	< 0.0.13

References

Advisories & Patches

https://github.com/netty/netty-incubator-codec-ohttp/commit/b687a0cf6ea1030232ea204d73bce82f2698e571 https://github.com/netty/netty-incubator-codec-ohttp/security/advisories/GHSA-q8f2-hxq5-cp4h https://github.com/netty/netty-incubator-codec-ohttp/commit/b687a0cf6ea1030232ea204d73bce82f2698e571 https://github.com/netty/netty-incubator-codec-ohttp/security/advisories/GHSA-q8f2-hxq5-cp4h

Exploits

https://github.com/netty/netty-incubator-codec-ohttp/security/advisories/GHSA-q8f2-hxq5-cp4h https://github.com/netty/netty-incubator-codec-ohttp/security/advisories/GHSA-q8f2-hxq5-cp4h

Frequently Asked Questions

What is CVE-2024-40642? +

The netty incubator codec.bhttp is a java language binary http parser. In affected versions the `BinaryHttpParser` class does not properly validate input values thus giving attackers almost complete control over the HTTP requests constructed from the parsed output. Attackers can abuse several issues individually to perform various injection attacks including HTTP request smuggling, desync attacks, HTTP header injections, request queue poisoning, caching attacks and Server Side Request Forgery (SSRF). Attacker could also combine several issues to create well-formed messages for other text-based protocols which may result in attacks beyond the HTTP protocol. The BinaryHttpParser class implements the readRequestHead method which performs most of the relevant parsing of the received request. The data structure prefixes values with a variable length integer value. The parsing code below first gets the lengths of the values from the prefixed variable length integer. After it has all of the lengths and calculates all of the indices, the parser casts the applicable slices of the ByteBuf to String. Finally, it passes these values into a new `DefaultBinaryHttpRequest` object where no further parsing or validation occurs. Method is partially validated while other values are not validated at all. Software that relies on netty to apply input validation for binary HTTP data may be vulnerable to various injection and protocol based attacks. This issue has been addressed in version 0.0.13.Final. Users are advised to upgrade. There are no known workarounds for this vulnerability. It has a CVSS v3.1 base score of 8.1 (HIGH).

How severe is CVE-2024-40642? +

CVE-2024-40642 has a CVSS v3.1 score of 8.1 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2024-40642? +

CVE-2024-40642 affects products from netty, specifically: netty-incubator-codec-ohttp. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-40642? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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