CVE-2025-9232

A flaw was found in the OpenSSL HTTP client API no_proxy handling. This vulnerability allows an application level denial of service (application crash) via an attacker-controlled IPv6 URL when the no_proxy environment variable is set.

This vulnerability was rated as Low severity because exploitation requires a very specific set of conditions: the application must pass an attacker-controlled IPv6 URL to the OpenSSL HTTP client functions, and the no_proxy environment variable must be set by the user. Even under these conditions, the issue can only lead to an out-of-bounds read resulting in a crash, causing an application level denial of service. There is no potential for information disclosure or remote code execution. Additionally, typical use cases of the OpenSSL HTTP client (e.g., in OCSP or CMP) do not involve attacker-controlled URLs, which further reduces the likelihood of exploitation.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.