IM
IronMonkey Threat Research

CVE-2019-9947 MEDIUM

Published: 2019-03-23 | Last Modified: 2026-10-07 | Status: Modified

Description

An issue was discovered in urllib2 in Python 2.x through 2.7.16 and urllib in Python 3.x through 3.7.3. CRLF injection is possible if the attacker controls a url parameter, as demonstrated by the first argument to urllib.request.urlopen with \r\n (specifically in the path component of a URL that lacks a ? character) followed by an HTTP header or a Redis command. This is similar to the CVE-2019-9740 query string issue. This is fixed in: v2.7.17, v2.7.17rc1, v2.7.18, v2.7.18rc1; v3.5.10, v3.5.10rc1, v3.5.8, v3.5.8rc1, v3.5.8rc2, v3.5.9; v3.6.10, v3.6.10rc1, v3.6.11, v3.6.11rc1, v3.6.12, v3.6.9, v3.6.9rc1; v3.7.4, v3.7.4rc1, v3.7.4rc2, v3.7.5, v3.7.5rc1, v3.7.6, v3.7.6rc1, v3.7.7, v3.7.7rc1, v3.7.8, v3.7.8rc1, v3.7.9.

Additional Descriptions (1)

Se detectó un problema en urllib2 en Python versión 2.x hasta la versión 2.7.16 y urllib en Python versión 3.x hasta la versión 3.7.3. La inyección de CRLF es posible si el atacante controla un parámetro url, como lo demuestra el primer argumento de urllib.request.urlopen con \r\n (específicamente en el componente path de una URL que carece de un carácter ?) Seguido por un encabezado HTTP o Un comando Redis. Esto se igual al CVE-2019-9740 problema con la cadena de consulta. Esto está corregido en las versiones: v2.7.17, v2.7.17rc1, v2.7.18, v2.7.18rc1; v3.5.10, v3.5.10rc1, v3.5.8, v3.5.8rc1, v3.5.8rc2, v3.5.9; v3.6.10, v3.6.10rc1, v3.6.11, v3.6.11rc1, v3.6.12, v3.6.9, v3.6.9rc1; v3.7.4, v3.7.4rc1, v3.7.4rc2, v3.7.5, v3.7.5rc1, v3.7.6, v3.7.6rc1, v3.7.7, v3.7.7rc1, v3.7.8, v3.7.8rc1, v3.7.9

CVSS Metrics

Base Score: 6.1 (MEDIUM)

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack VectorNETWORK
Attack ComplexityLOW
Privileges RequiredNONE
User InteractionREQUIRED
ScopeCHANGED
Confidentiality ImpactLOW
Integrity ImpactLOW
Availability ImpactNONE

Source: [email protected]

Type: Primary

Exploitability Score: 2.8

Impact Score: 2.7

Base Score: 4.3 (MEDIUM)

AV:N/AC:M/Au:N/C:N/I:P/A:N

Access VectorNETWORK
Access ComplexityMEDIUM
AuthenticationNONE
Confidentiality ImpactNONE
Integrity ImpactPARTIAL
Availability ImpactNONE

Source: [email protected]

Type: Primary

Exploitability Score: 8.6

Impact Score: 2.9

Weaknesses

Source Type Description
[email protected] Primary
en CWE-93
134c704f-9b21-4f2e-91b3-4a467353bcc0 Secondary
en CWE-93

Affected Products

Vendor Product Version Update Type
python python * <built-in method update of dict object at 0x7fd2d39fe5c0> Application
python python * <built-in method update of dict object at 0x7fd2dbc187c0> Application
python python * <built-in method update of dict object at 0x7fd39c4dcc40> Application
python python * <built-in method update of dict object at 0x7fd319e51980> Application

Affected Configurations

Operator: OR

Vulnerable CPE
Yes cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
Yes cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
Yes cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
Yes cpe:2.3:a:python:python:*:*:*:*:*:*:*:*

References