CVE-2023-40225 describes a vulnerability in HAProxy versions up to 2.8.2 where it improperly forwards empty Content-Length headers, potentially leading an HTTP/1 backend server to misinterpret subsequent data as an additional request. This issue carries a CVSS score of 7.2 (High), indicating a network-based attack with low complexity that could lead to partial confidentiality and integrity impacts. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 2.0.32CPE matchmatch criteria | cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:* | ||
>= 2.2.0, <= 2.2.30CPE matchmatch criteria | cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:* | ||
>= 2.4.0, <= 2.4.23CPE matchmatch criteria | cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:* | ||
>= 2.5.0, < 2.6.15CPE matchmatch criteria | cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:* | ||
>= 2.7.0, < 2.7.10CPE matchmatch criteria | cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
haproxy: Proxy forwards malformed empty Content-Length headers
Aug 10, 2023HAProxy through 2.0.32 2.1.x and 2.2.x through 2.2.30 2.3.x and 2.4.x through 2.4.23 2.5.x and 2.6.x before 2.6.15 2.7.x before 2.7.10 and 2.8.x before 2.8.2 forwards empty Content-Length headers violating RFC 9110 section 8.6. In uncommon cases an HTTP/1 server behind HAProxy may interpret the payload as an extra request.
Aug 8, 2023