VulnerabilityModified
CVE-2019-19330
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.
CRITICAL 9.8EPSS 3.96%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.96%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 3.96% probability · 90th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-74
- Affected
- haproxy/haproxy · canonical/ubuntu linux · debian/debian linux
- Source
- cve@mitre.org
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/45Mailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202004-01
- https://tools.ietf.org/html/rfc7540#section-10.3Third Party Advisory
- https://usn.ubuntu.com/4212-1/Third Party Advisory
- https://www.debian.org/security/2019/dsa-4577Third Party Advisory
- 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/45Mailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202004-01
- https://tools.ietf.org/html/rfc7540#section-10.3Third Party Advisory
- https://usn.ubuntu.com/4212-1/Third Party Advisory
- https://www.debian.org/security/2019/dsa-4577Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.