onyx --cves cve-2021-40346
CVE-2021-40346
- score
- <0.1
- cvss
- 7.5
- epss
- 58.8%
- published
- 2021-09-08
- kev added
- —
- first seen
HAProxy 2.0 through 2.5 contains an integer overflow caused by improper handling in htx_add_header, letting attackers perform HTTP request smuggling, bypassing ACLs, exploit requires sending crafted HTTP requests.
Timeline
How this CVE moved toward exploitation. Chart: last 30 days — trend score, EPSS, community mentions per day; hover the event lane.
- Published
- Tracked by Onyx
- Public PoC
Exploit availability
Public PoC flagged by vulnx; no direct exploit link among the citations.
Weaknesses
References 10
- https://git.haproxy.org/?p=haproxy.git
- https://github.com/haproxy/haproxy/commit/3b69886f7dcc3cfb3d166309018e6cfec9ce2c95
- https://jfrog.com/blog/critical-vulnerability-in-haproxy-cve-2021-40346-integer-overflow-enables-http-smuggling/
- https://lists.apache.org/thread.html/r284567dd7523f5823e2ce995f787ccd37b1cc4108779c50a97c79120%40%3Cdev.cloudstack.apache.org%3E
- https://lists.apache.org/thread.html/r8a58fd7a29808e5d27ee56877745e58dc4bb041b9af94601554e2a5a%40%3Cdev.cloudstack.apache.org%3E
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/A7V2IYO22LWVBGUNZWVKNTMDV4KINLFO/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MXTSBY2TEAXWZVFQM3CXHJFRONX7PEMN/
- https://www.mail-archive.com/haproxy%40formilux.org
- https://www.debian.org/security/2021/dsa-4968
- https://www.mail-archive.com/haproxy%40formilux.org/msg41114.html