CVE-2025-47905
Varnish Cache HTTP/1 Chunk Boundary CRLF Injection
Description
Varnish Cache before 7.6.3 and 7.7 before 7.7.1, and Varnish Enterprise before 6.0.13r14, allow client-side desync via HTTP/1 requests, because the product incorrectly permits CRLF to be skipped to delimit chunk boundaries.
INFO
Published Date :
May 13, 2025, 10:15 p.m.
Last Modified :
May 29, 2025, 9:15 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update all affected Varnish packages.
- Consult vendor advisories for specific guidance.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-47905.
| URL | Resource |
|---|---|
| https://varnish-cache.org/security/VSV00016.html | |
| http://www.openwall.com/lists/oss-security/2025/05/15/2 | |
| https://lists.debian.org/debian-lts-announce/2025/05/msg00040.html |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-47905 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-47905
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-47905 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-47905 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
May. 29, 2025
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2025/05/msg00040.html -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
May. 15, 2025
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2025/05/15/2 -
New CVE Received by [email protected]
May. 13, 2025
Action Type Old Value New Value Added Description Varnish Cache before 7.6.3 and 7.7 before 7.7.1, and Varnish Enterprise before 6.0.13r14, allow client-side desync via HTTP/1 requests, because the product incorrectly permits CRLF to be skipped to delimit chunk boundaries. Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N Added CWE CWE-444 Added Reference https://varnish-cache.org/security/VSV00016.html