CVE-2021-39240
haproxy: does not ensure that the scheme and path portions of a URI have the expected characters
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
An issue was discovered in HAProxy 2.2 before 2.2.16, 2.3 before 2.3.13, and 2.4 before 2.4.3. It does not ensure that the scheme and path portions of a URI have the expected characters. For example, the authority field (as observed on a target HTTP/2 server) might differ from what the routing rules were intended to achieve.
Se ha detectado un problema en HAProxy versiones 2.2 anteriores a 2.2.16, versiones 2.3 anteriores a 2.3.13 y versiones 2.4 anteriores a 2.4.3. No se asegura que las porciones de esquema y ruta de un URI tengan los caracteres esperados. Por ejemplo, el campo authority (como es observado en un servidor HTTP/2 de destino) podrÃa diferir de lo que las reglas de enrutamiento pretendÃan lograr.
A flaw was found in haproxy. An input validation flaw when processing HTTP/2 requests causes haproxy to not ensure that the scheme and path portions of a URI have the expected characters. This may cause specially crafted input to bypass implemented security restrictions. The highest threat from this vulnerability is confidentiality.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2021-08-17 CVE Reserved
- 2021-08-17 CVE Published
- 2024-08-04 CVE Updated
- 2024-10-18 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-20: Improper Input Validation
CAPEC
References (8)
| URL | Tag | Source |
|---|---|---|
| https://git.haproxy.org/?p=haproxy.git%3Ba=commit%3Bh=4b8852c70d8c4b7e225e24eb58258a15eb54c26e | X_refsource_misc | |
| https://git.haproxy.org/?p=haproxy.git%3Ba=commit%3Bh=a495e0d94876c9d39763db319f609351907a31e8 | X_refsource_misc | |
| https://www.mail-archive.com/haproxy%40formilux.org/msg41041.html | X_refsource_misc |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
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Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Haproxy Search vendor "Haproxy" | Haproxy Search vendor "Haproxy" for product "Haproxy" | >= 2.2.0 < 2.2.16 Search vendor "Haproxy" for product "Haproxy" and version " >= 2.2.0 < 2.2.16" | - |
Affected
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| Haproxy Search vendor "Haproxy" | Haproxy Search vendor "Haproxy" for product "Haproxy" | >= 2.3.0 < 2.3.13 Search vendor "Haproxy" for product "Haproxy" and version " >= 2.3.0 < 2.3.13" | - |
Affected
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| Haproxy Search vendor "Haproxy" | Haproxy Search vendor "Haproxy" for product "Haproxy" | >= 2.4.0 < 2.4.3 Search vendor "Haproxy" for product "Haproxy" and version " >= 2.4.0 < 2.4.3" | - |
Affected
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| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 11.0 Search vendor "Debian" for product "Debian Linux" and version "11.0" | - |
Affected
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| Fedoraproject Search vendor "Fedoraproject" | Fedora Search vendor "Fedoraproject" for product "Fedora" | 33 Search vendor "Fedoraproject" for product "Fedora" and version "33" | - |
Affected
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| Fedoraproject Search vendor "Fedoraproject" | Fedora Search vendor "Fedoraproject" for product "Fedora" | 34 Search vendor "Fedoraproject" for product "Fedora" and version "34" | - |
Affected
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