CVE-2021-40346
high-risk
Published 2021-09-08
An integer overflow exists in HAProxy 2.0 through 2.5 in htx_add_header that can be exploited to perform an HTTP request smuggling attack, allowing an attacker to bypass all configured http-request HAProxy ACLs and possibly other ACLs.
Do I need to act?
!
92.4% chance of exploitation in next 30 days
EPSS score — higher than 8% of all CVEs
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10
High
NETWORK
/ LOW complexity
Affected Products (11)
Affected Vendors
References (20)
Third Party Advisory
https://www.debian.org/security/2021/dsa-4968
Third Party Advisory
https://www.debian.org/security/2021/dsa-4968
62
/ 100
high-risk
Severity
26/34 · High
Exploitability
20/34 · Moderate
Exposure
16/34 · Moderate