CVE-2025-4969: Libsoup: off-by-one out-of-bounds read in find_boundary() in soup-multipart.c
A vulnerability was found in the libsoup package. This flaw stems from its failure to correctly verify the termination of multipart HTTP messages. This can allow a remote attacker to send a specially crafted multipart HTTP body, causing the libsoup-consuming server to read beyond its allocated memory boundaries (out-of-bounds read).
Other sources
In libsoup's soup-form.c, the function findboundary() is vulnerable to a buffer under-read issue when the function attempts to locate the boundary in a multipart form. If a malicious client submits a malformed multipart body, the function will attempt to read out of bonds.
— Red Hat
Libsoup: off-by-one out-of-bounds read in findboundary() in soup-multipart.c
— Microsoft
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2025-4969?
CVE-2025-4969 has been rated as a high severity vulnerability due to its potential to allow remote code execution.
How does CVE-2025-4969 affect libsoup?
CVE-2025-4969 affects libsoup by allowing attackers to exploit multipart HTTP message handling, leading to potential memory corruption.
How do I fix CVE-2025-4969?
To fix CVE-2025-4969, update libsoup to the latest version where the vulnerability has been patched.
Who is impacted by CVE-2025-4969?
Users and applications relying on the vulnerable libsoup library are impacted by CVE-2025-4969.
What can an attacker do with CVE-2025-4969?
An attacker can exploit CVE-2025-4969 to send specially crafted HTTP requests that may lead to unauthorized access or server crashes.