CVE-2023-0836 is an information leak vulnerability affecting HAProxy versions 2.1 through 2.7.1 (excluding patched versions). This flaw stems from 5 uninitialized bytes in the connection buffer during FCGI_BEGIN_REQUEST record encoding, potentially disclosing sensitive data to FastCGI backends. With a CVSS score of 7.5 (HIGH), it is a network-exploitable vulnerability with low attack complexity and high confidentiality impact, requiring no user interaction or privileges. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 2.2.0, < 2.2.27CPE matchmatch criteria | cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:* | ||
>= 2.4.0, <= 2.4.21CPE matchmatch criteria | cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:* | ||
>= 2.5.0, <= 2.5.11CPE matchmatch criteria | cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:* | ||
>= 2.6.0, <= 2.6.8CPE matchmatch criteria | cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:* | ||
2.1.0CPE matchmatch criteria | cpe:2.3:a:haproxy:haproxy:2.1.0:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
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The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.