QID 356216

Date Published: 2023-09-28

QID 356216: Amazon Linux Security Advisory for haproxy2 : ALASHAPROXY2-2023-003

Haproxy before 2.7.3 may allow a bypass of access control because http/1 headers are inadvertently lost in some situations, aka "request smuggling."
The http header parsers in haproxy may accept empty header field names, which could be used to truncate the list of http headers and thus make some headers disappear after being parsed and processed for http/1.0 and http/1.1.
For http/2 and http/3, the impact is limited because the headers disappear before being parsed and processed, as if they had not been sent by the client.
The fixed versions are 2.7.3, 2.6.9, 2.5.12, 2.4.22, 2.2.29, and 2.0.31. (
( CVE-2023-25725)



Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

Successful exploitation of this vulnerability could lead to a securitybreach or could affect integrity, availability, and confidentiality.

  • CVSS V3 rated as Critical - 9.1 severity.
  • CVSS V2 rated as Medium - 5.4 severity.
    • Solution
    Please refer to Amazon advisory: ALASHAPROXY2-2023-003 for affected packages and patching details, or update with your package manager.
    Vendor References

    CVEs related to QID 356216

    CVE-2023-25725 |
    Software Advisories
    Advisory ID Software Component Link
    ALASHAPROXY2-2023-003 amazon linux 2 URL Logo alas.aws.amazon.com/AL2/ALASHAPROXY2-2023-003.html
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