CVE-2019-19330
9.8
CRITICAL · CVSS 3.1 · EPSS 4% (pctl 90)
In your normal cycle
Critical by CVSS (9.8), but no sign of active exploitation.
Description
The HTTP/2 implementation in HAProxy before 2.0.10 mishandles headers, as demonstrated by carriage return (CR, ASCII 0xd), line feed (LF, ASCII 0xa), and the zero character (NUL, ASCII 0x0), aka Intermediary Encapsulation Attacks.
Scoring
| CVSS | 9.8 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 4.03% — more likely to be exploited than 90% of all CVEs |
| Weakness | CWE-74 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2019-11-27 |
| Last modified | 2026-06-17 |
Affected (3)
| Vendor | Product |
|---|---|
| canonical | ubuntu linux |
| debian | debian linux |
| haproxy | haproxy |
References
- https://git.haproxy.org/?p=haproxy-2.0.git%3Ba=commit%3Bh=ac198b92d461515551b95daae20954b3053ce87e
- https://git.haproxy.org/?p=haproxy.git%3Ba=commit%3Bh=146f53ae7e97dbfe496d0445c2802dd0a30b0878
- https://git.haproxy.org/?p=haproxy.git%3Ba=commit%3Bh=54f53ef7ce4102be596130b44c768d1818570344
- https://seclists.org/bugtraq/2019/Nov/45
- https://security.gentoo.org/glsa/202004-01
- https://tools.ietf.org/html/rfc7540#section-10.3
- https://usn.ubuntu.com/4212-1/
- https://www.debian.org/security/2019/dsa-4577
- https://git.haproxy.org/?p=haproxy-2.0.git%3Ba=commit%3Bh=ac198b92d461515551b95daae20954b3053ce87e
- https://git.haproxy.org/?p=haproxy.git%3Ba=commit%3Bh=146f53ae7e97dbfe496d0445c2802dd0a30b0878
- https://git.haproxy.org/?p=haproxy.git%3Ba=commit%3Bh=54f53ef7ce4102be596130b44c768d1818570344
- https://seclists.org/bugtraq/2019/Nov/45
- https://security.gentoo.org/glsa/202004-01
- https://tools.ietf.org/html/rfc7540#section-10.3
- https://usn.ubuntu.com/4212-1/
- https://www.debian.org/security/2019/dsa-4577
→ the Explorer · watch your stack · NVD