CVE-2020-15810
squid: HTTP Request Smuggling could result in cache poisoning
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
An issue was discovered in Squid before 4.13 and 5.x before 5.0.4. Due to incorrect data validation, HTTP Request Smuggling attacks may succeed against HTTP and HTTPS traffic. This leads to cache poisoning. This allows any client, including browser scripts, to bypass local security and poison the proxy cache and any downstream caches with content from an arbitrary source. When configured for relaxed header parsing (the default), Squid relays headers containing whitespace characters to upstream servers. When this occurs as a prefix to a Content-Length header, the frame length specified will be ignored by Squid (allowing for a conflicting length to be used from another Content-Length header) but relayed upstream.
Se detectó un problema en Squid versiones anteriores a 4.13 y versiones 5.x anteriores a 5.0.4. Debido a una comprobación de datos incorrecta, los ataques de Contrabando de Peticiones HTTP pueden tener éxito contra el tráfico HTTP y HTTPS. Esto conlleva a un envenenamiento de la caché. Esto permite a cualquier cliente, incluyendo los scripts del navegador, omitir la seguridad local y envenenar el caché del proxy y cualquier caché aguas abajo con contenido de una fuente arbitraria. Cuando es configurado para un análisis de encabezado relajado (el valor predeterminado), Squid transmite encabezados que contienen caracteres de espacio en blanco hacia los servidores aguas arriba. Cuando esto ocurre como un prefijo en un encabezado Content-Length, Squid ignorará la longitud de trama especificada (permitiendo usar una longitud conflictiva desde otro encabezado Content-Length) pero se retransmitirá aguas arriba
A flaw was found in squid. Due to incorrect data validation, a HTTP Request Smuggling attack against HTTP and HTTPS traffic is possible leading to cache poisoning. The highest threat from this vulnerability is to data confidentiality and integrity.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2020-07-17 CVE Reserved
- 2020-08-27 CVE Published
- 2023-03-07 EPSS Updated
- 2024-08-04 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
CAPEC
References (15)
| URL | Tag | Source |
|---|---|---|
| https://github.com/squid-cache/squid/security/advisories/GHSA-3365-q9qx-f98m | Mitigation | |
| https://lists.debian.org/debian-lts-announce/2020/10/msg00005.html | Mailing List |
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| https://security.netapp.com/advisory/ntap-20210219-0007 | Third Party Advisory |
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| https://security.netapp.com/advisory/ntap-20210226-0006 | Third Party Advisory |
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| https://security.netapp.com/advisory/ntap-20210226-0007 | Broken Link |
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Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | < 4.13 Search vendor "Squid-cache" for product "Squid" and version " < 4.13" | - |
Affected
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| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | >= 5.0 < 5.0.4 Search vendor "Squid-cache" for product "Squid" and version " >= 5.0 < 5.0.4" | - |
Affected
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| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 16.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "16.04" | lts |
Affected
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| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 18.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "18.04" | lts |
Affected
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| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 20.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "20.04" | lts |
Affected
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| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0" | - |
Affected
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| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0" | - |
Affected
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| Fedoraproject Search vendor "Fedoraproject" | Fedora Search vendor "Fedoraproject" for product "Fedora" | 31 Search vendor "Fedoraproject" for product "Fedora" and version "31" | - |
Affected
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| Fedoraproject Search vendor "Fedoraproject" | Fedora Search vendor "Fedoraproject" for product "Fedora" | 32 Search vendor "Fedoraproject" for product "Fedora" and version "32" | - |
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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| Opensuse Search vendor "Opensuse" | Leap Search vendor "Opensuse" for product "Leap" | 15.1 Search vendor "Opensuse" for product "Leap" and version "15.1" | - |
Affected
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| Opensuse Search vendor "Opensuse" | Leap Search vendor "Opensuse" for product "Leap" | 15.2 Search vendor "Opensuse" for product "Leap" and version "15.2" | - |
Affected
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