CVE-2023-38545 & CVE-2023-38546 - Test Data Manager
Article ID: 274866
Updated On:
Products
Issue/Introduction
CVE-2023-38545 SOCKS5 heap buffer overflow
A heap-based buffer overflow flaw in the SOCKS5 proxy handshake of the Curl package that could lead to arbitrary remote code execution when using SOCKS5 proxies to access untrusted web servers.
Severity: High
Affected versions: Curl and libcurl from 7.69.0 up to and including 8.3.0.
Description: This flaw makes curl overflow a heap based buffer in the SOCKS5 proxy handshake.
When curl is asked to pass along the hostname to the SOCKS5 proxy to allow that to resolve the address instead of it getting done by curl itself, the maximum length that hostname can be is 255 bytes.
If the hostname is detected to be longer than 255 bytes, curl switches to local name resolving and instead passes on the resolved address only to the proxy. Due to a bug, the local variable that means "let the host resolve the name" could get the wrong value during a slow SOCKS5 handshake, and contrary to the intention, copy the too long hostname to the target buffer instead of copying just the resolved address there.
CVE-2023-38546 Cookie injection with none file
It is a low severity vulnerability that only impacts libcurl – a library provided by the Curl project that allows developers to access Curl APIs from their own code.
Severity: Low
Affected versions: libcurl from 7.9.1 up to and including 8.3.0.
Description: This flaw allows an attacker to insert cookies at will into a running program using libcurl, if the specific series of conditions are met.
libcurl performs transfers. In its API, an application creates "easy handles" that are the individual handles for single transfers.
libcurl provides a function call that duplicates an easy handle called curl_easy_duphandle.
If a transfer has cookies enabled when the handle is duplicated, the cookie-enable state is also cloned - but without cloning the actual cookies. If the source handle did not read any cookies from a specific file on disk, the cloned version of the handle would instead store the file name as none (using the four ASCII letters, no quotes).
Subsequent use of the cloned handle that does not explicitly set a source to load cookies from would then inadvertently load cookies from a file named none - if such a file exists and is readable in the current directory of the program using libcurl. And if using the correct file format of course.
Environment
Impacted: TDM Masking Image from 4.10.99.0 up to and including 4.10.223.0
Not Impacted: All the other installers and docker images
Cause
Third Party Vulnerability
Resolution
Based on our initial review, curl is being used in Test Data Manager’s Masking docker image.
However, it is not exploitable since SOCKS5 proxy is not enabled/used in TDM for connecting to remote hosts.
A new version of TDM Masking image 4.10.224.0 that contains updated curl and libcurl 8.4.0 is available at https://ftp.broadcom.com/user/downloads/pub/TDM/TDM_Portal_docker/TDM_Portal_docker-4.10.224.0.tgz
Additional Information
This KB will be updated on a continuous basis as the situation evolves.
Feedback
