CVE-2019-18348
python: CRLF injection via the host part of the url passed to urlopen()
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
An issue was discovered in urllib2 in Python 2.x through 2.7.17 and urllib in Python 3.x through 3.8.0. CRLF injection is possible if the attacker controls a url parameter, as demonstrated by the first argument to urllib.request.urlopen with \r
(specifically in the host component of a URL) followed by an HTTP header. This is similar to the CVE-2019-9740 query string issue and the CVE-2019-9947 path string issue. (This is not exploitable when glibc has CVE-2016-10739 fixed.). This is fixed in: v2.7.18, v2.7.18rc1; v3.5.10, v3.5.10rc1; v3.6.11, v3.6.11rc1, v3.6.12; v3.7.8, v3.7.8rc1, v3.7.9; v3.8.3, v3.8.3rc1, v3.8.4, v3.8.4rc1, v3.8.5, v3.8.6, v3.8.6rc1.
Se detectó un problema en urllib2 en Python versiones 2.x hasta 2.7.17 y urllib en Python versiones 3.x hasta 3.8.0. La inyección de CRLF es posible si el atacante controla un parámetro url, como es demostrado por el primer argumento para urllib.request.urlopen con \ r
(específicamente en el componente host de una URL) seguido de un encabezado HTTP. Esto es similar al problema de la cadena de consulta de CVE-2019-9740 y al problema de la cadena de ruta de CVE-2019-9947. (Esto no es explotable cuando glibc tiene corregido el CVE-2016-10739). Esto está corregido en las versiones: v2.7.18, v2.7.18rc1; v3.5.10, v3.5.10rc1; v3.6.11, v3.6.11rc1, v3.6.12; v3.7.8, v3.7.8rc1, v3.7.9; v3.8.3, v3.8.3rc1, v3.8.4, v3.8.4rc1, v3.8.5, v3.8.6, v3.8.6rc1
A CRLF injection flaw was discovered in python in the way URLs are handled when doing an HTTP/HTTPS connection (e.g. through urlopen() or HTTPConnection). An attacker who can control the url parameter passed to urlopen method in the urllib/urllib2 modules can inject CRLF sequences and HTTP headers by abusing the "host" part of the URL.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2019-10-23 CVE Reserved
- 2019-10-23 CVE Published
- 2024-08-05 CVE Updated
- 2024-10-16 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
- CWE-113: Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')
CAPEC
References (14)
| URL | Tag | Source |
|---|---|---|
| https://lists.debian.org/debian-lts-announce/2020/07/msg00011.html | Mailing List |
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| https://security.netapp.com/advisory/ntap-20191107-0004 | Technical Description |
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| https://www.oracle.com/security-alerts/cpuoct2020.html | Technical Description |
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Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Python Search vendor "Python" | Python Search vendor "Python" for product "Python" | >= 2.0 <= 2.7.17 Search vendor "Python" for product "Python" and version " >= 2.0 <= 2.7.17" | - |
Affected
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| Python Search vendor "Python" | Python Search vendor "Python" for product "Python" | >= 3.0 < 3.5.10 Search vendor "Python" for product "Python" and version " >= 3.0 < 3.5.10" | - |
Affected
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| Python Search vendor "Python" | Python Search vendor "Python" for product "Python" | >= 3.6.0 < 3.6.11 Search vendor "Python" for product "Python" and version " >= 3.6.0 < 3.6.11" | - |
Affected
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| Python Search vendor "Python" | Python Search vendor "Python" for product "Python" | >= 3.7.0 < 3.7.8 Search vendor "Python" for product "Python" and version " >= 3.7.0 < 3.7.8" | - |
Affected
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| Python Search vendor "Python" | Python Search vendor "Python" for product "Python" | >= 3.8.0 < 3.8.3 Search vendor "Python" for product "Python" and version " >= 3.8.0 < 3.8.3" | - |
Affected
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