Gentoo update for Python
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 6 |
| CVE-ID | CVE-2018-20852 CVE-2019-5010 CVE-2019-9636 CVE-2019-9740 CVE-2019-9947 CVE-2019-9948 |
| CWE-ID | CWE-200 CWE-476 CWE-20 CWE-93 CWE-749 |
| Exploitation vector | Network |
| Public exploit |
Public exploit code for vulnerability #2 is available. Public exploit code for vulnerability #4 is available. Public exploit code for vulnerability #5 is available. Public exploit code for vulnerability #6 is available. |
| Vulnerable software Subscribe |
Gentoo Linux Operating systems & Components / Operating system |
| Vendor | Gentoo |
Security Bulletin
This security bulletin contains information about 6 vulnerabilities.
1) Information disclosure
EUVDB-ID: #VU19256
Risk: Medium
CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2018-20852
CWE-ID:
CWE-200 - Information exposure
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to the "http.cookiejar.DefaultPolicy.domain_return_ok" in the "Lib/http/cookiejar.py" file returns incorrect results during cookie domain checks. A remote attacker can trick a victim to execute a program that uses the "http.cookiejar.DefaultPolicy" to make an HTTP connection to an attacker-controlled server with a hostname that has another valid hostname as a suffix.
Successful exploitation of this vulnerability can allow an attacker to gain unauthorized access to sensitive information on the system, such as existing cookies. Mitigation
Update the affected packages.
dev-lang/python to version:
Gentoo Linux: All versions
External linkshttp://security.gentoo.org/
http://security.gentoo.org/glsa/202003-26
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) NULL pointer dereference
EUVDB-ID: #VU17805
Risk: Medium
CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:P/RL:O/RC:C]
CVE-ID: CVE-2019-5010
CWE-ID:
CWE-476 - NULL Pointer Dereference
Exploit availability: Yes
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to the X509 certificate parser of the affected software improperly handles X509 certificates with a certificate extension that uses a Certificate Revocation List (CRL) distribution point with empty distributionPoint and cRLIssuer fields. A remote attacker can send a request to initiate a Transport Layer Security (TLS) connection using an X509 certificate that submits malicious input, trigger a NULL pointer dereference condition that causes the application to crash, resulting in a DoS condition.
MitigationUpdate the affected packages.
dev-lang/python to version:
Gentoo Linux: All versions
External linkshttp://security.gentoo.org/
http://security.gentoo.org/glsa/202003-26
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.
3) Input validation error
EUVDB-ID: #VU18355
Risk: Medium
CVSSv3.1: 6.2 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2019-9636
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
Description
The vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to insufficient validation of user-supplied input when processing data in Unicode encoding with an incorrect netloc during NFKC normalization. A remote attacker can gain access to sensitive information.
Update the affected packages.
dev-lang/python to version:
Gentoo Linux: All versions
External linkshttp://security.gentoo.org/
http://security.gentoo.org/glsa/202003-26
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
4) CRLF injection
EUVDB-ID: #VU18829
Risk: Medium
CVSSv3.1: 4.3 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N/E:P/RL:O/RC:C]
CVE-ID: CVE-2019-9740
CWE-ID:
CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform CRLF injection attacks.
The vulnerability exists within urllib2 implementation for Python 2.x and urllib3 implementation for Python 3.x when processing the path component of a URL after the "?" character within the urllib.request.urlopen() call. A remote attacker with ability to control URL, passed to the application, can use CRLF sequences to split the HTTP request and inject arbitrary HTTP headers into request, made by the application.
MitigationUpdate the affected packages.
dev-lang/python to version:
Gentoo Linux: All versions
External linkshttp://security.gentoo.org/
http://security.gentoo.org/glsa/202003-26
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.
5) CRLF injection
EUVDB-ID: #VU18828
Risk: Medium
CVSSv3.1: 4.3 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N/E:P/RL:O/RC:C]
CVE-ID: CVE-2019-9947
CWE-ID:
CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform CRLF injection attacks.
The vulnerability exists within urllib2 implementation for Python 2.x and urllib3 implementation for Python 3.x when processing the path component of a URL that lacks the "?" character within the urllib.request.urlopen() call. A remote attacker with ability to control URL, passed to the application, can use CRLF sequences to split the HTTP request and inject arbitrary HTTP headers into request, made by the application.
MitigationUpdate the affected packages.
dev-lang/python to version:
Gentoo Linux: All versions
External linkshttp://security.gentoo.org/
http://security.gentoo.org/glsa/202003-26
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.
6) Exposed dangerous method or function
EUVDB-ID: #VU18827
Risk: Medium
CVSSv3.1: 6.1 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N/E:P/RL:O/RC:C]
CVE-ID: CVE-2019-9948
CWE-ID:
CWE-749 - Exposed Dangerous Method or Function
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to bypass certain security restrictions.
The vulnerability exists due to urllib implementation in Python 2.x supports the local_file: scheme. An attacker with ability to control input data, such as URL, can bypass protection mechanisms that blacklist file: URIs and view contents of arbitrary file on the system.
PoC:
urllib.urlopen('local_file:///etc/passwd')
Mitigation
Update the affected packages.
dev-lang/python to version:
Gentoo Linux: All versions
External linkshttp://security.gentoo.org/
http://security.gentoo.org/glsa/202003-26
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.
