Out-of-bounds write in github.com/cloudflare/golz4

The core issue lies in the golz4 library's reliance on a deprecated C API. This API is known to be vulnerable to memory corruption attacks. An attacker who can control the input provided to the golz4 library can craft malicious data that triggers this memory corruption. Successful exploitation could allow an attacker to execute arbitrary code on the system running the affected application. The potential impact is severe, ranging from complete system compromise to data theft and denial of service. This vulnerability is particularly concerning because golz4 is often used as a dependency in larger Go applications, potentially expanding the attack surface.

Applications written in Go that utilize the github.com/cloudflare/golz4 library are at risk. This includes applications that perform data compression or decompression using golz4, particularly those handling user-supplied data without proper validation. Developers who have integrated golz4 as a dependency in their projects, especially those unaware of this vulnerability, are also at risk.

• go: Inspect your go.mod file for dependencies on golz4 and check the version. Use go list -m all to identify all dependencies and their versions.

go list -m all | grep golz4

• go: Monitor application logs for crashes or unexpected behavior related to data compression/decompression, which could indicate exploitation attempts. • generic web: If golz4 is used in a web application, monitor for unusual HTTP request patterns or error messages related to data processing.

1. 2014-07-11Patch

   patch

2. 2021-04-14Disclosure

   disclosure

1. 发布日期2021-04-14
2. 修改日期2024-05-20
3. EPSS 更新日期2026-04-02

The primary mitigation for CVE-2014-125026 is to upgrade to version 0.0.0-20140711154735-199f5f787806 or later. If upgrading immediately is not feasible due to compatibility issues or breaking changes, consider isolating the golz4 library behind a strict input validation layer. This layer should sanitize all user-supplied data before it's processed by golz4, preventing the injection of malicious input. While not a complete solution, this can reduce the risk. Monitor your application logs for any unusual memory access patterns or crashes that might indicate exploitation attempts. After upgrading, confirm the fix by attempting to reproduce the vulnerability with known malicious inputs and verifying that the application handles them safely.