VDB
CVE-2019-18277
CVE-2019-18277
PUBLISHED
CVSS 7.5 HIGH
A flaw was found in HAProxy before 2.0.6. In legacy mode, messages featuring a transfer-encoding header missing the "chunked" value were not being correctly rejected. The impact was limited but if combined with the "http-reuse always" setting, it could be used to help construct an HTTP request smuggling attack against a vulnerable component employing a lenient parser that would ignore the content-length header as soon as it saw a transfer-encoding one (even if not entirely valid according to the specification).
EPSS 10.02% · 95.5th percentile
Risk Scores
CVSS 3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS Score
10.02%
95.5th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:18.04:LTS | haproxy | 1.8.8-1ubuntu0.4, 0, 1.7.9-1ubuntu1 |
| Ubuntu:16.04:LTS | haproxy | 1.5.14-1, 1.6.2-1, 1.6.2-2 |
Timeline
- Oct 23, 2019 CVE Published
- Apr 14, 2021 EPSS Score
- Jun 23, 2021 EPSS Score
- Oct 26, 2021 EPSS Score
- Dec 28, 2021 EPSS Score
- Feb 4, 2022 EPSS Score
- Feb 28, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- Jul 4, 2022 EPSS Score
- Sep 6, 2022 EPSS Score
- Nov 7, 2022 EPSS Score
- Mar 7, 2023 EPSS Score
References
- https://ubuntu.com/security/CVE-2019-18277 third-party-advisory
- https://nathandavison.com/blog/haproxy-http-request-smuggling third-party-advisory
- https://www.mail-archive.com/haproxy@formilux.org/msg34926.html third-party-advisory
- https://ubuntu.com/security/notices/USN-4174-1 vendor-advisory
- https://www.cve.org/CVERecord?id=CVE-2019-18277 third-party-advisory