Red Hat Software Collections update for python27-python and python27-python-pip



Risk Medium
Patch available YES
Number of vulnerabilities 4
CVE-ID CVE-2021-4189
CVE-2022-0391
CVE-2021-3737
CVE-2021-3733
CWE-ID CWE-918
CWE-93
CWE-835
CWE-399
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		python27-python (Red Hat package)
Operating systems & Components / Operating system package or component

python27-python-pip (Red Hat package)
Operating systems & Components / Operating system package or component

Red Hat Software Collections
Universal components / Libraries / Software for developers

Vendor Red Hat Inc.

Security Bulletin

This security bulletin contains information about 4 vulnerabilities.

1) Server-Side Request Forgery (SSRF)

EUVDB-ID: #VU61681

Risk: Medium

CVSSv3.1: 5.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-4189

CWE-ID: CWE-918 - Server-Side Request Forgery (SSRF)

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to perform SSRF attacks.

The vulnerability exists due to insufficient validation of user-supplied input in the FTP (File Transfer Protocol) client library when using it in PASV (passive) mode. A remote attacker can set up a malicious FTP server, trick the FTP client in Python into connecting back to a given IP address and port, which can lead to FTP client scanning ports which otherwise would not have been possible.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

python27-python (Red Hat package): 2.7.8-3.el7 - 2.7.17-2.el7

python27-python-pip (Red Hat package): 8.1.2-2.el7

Red Hat Software Collections: 1 for RHEL 7

CPE2.3 External links

http://access.redhat.com/errata/RHSA-2022:1663


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) CRLF injection

EUVDB-ID: #VU61675

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-0391

CWE-ID: CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')

Exploit availability: No

Description

The vulnerability allows a remote attacker to inject arbitrary data in server response.

The vulnerability exists due to insufficient validation of attacker-supplied data within the urllib.parse module in Python. A remote attacker can pass specially crafted data to the application containing CR-LF characters and modify application behavior.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

python27-python (Red Hat package): 2.7.8-3.el7 - 2.7.17-2.el7

python27-python-pip (Red Hat package): 8.1.2-2.el7

Red Hat Software Collections: 1 for RHEL 7

CPE2.3 External links

http://access.redhat.com/errata/RHSA-2022:1663


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.

3) Infinite loop

EUVDB-ID: #VU59089

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3737

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to infinite loop. A remote attacker who controls a malicious server can force the client to enter an infinite loop on a 100 Continue response.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

python27-python (Red Hat package): 2.7.8-3.el7 - 2.7.17-2.el7

python27-python-pip (Red Hat package): 8.1.2-2.el7

Red Hat Software Collections: 1 for RHEL 7

CPE2.3 External links

http://access.redhat.com/errata/RHSA-2022:1663


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) Resource management error

EUVDB-ID: #VU58295

Risk: Low

CVSSv3.1: 2.7 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3733

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper management of internal resources within the application within the AbstractBasicAuthHandler class in urllib. A remote attacker with control over the server can perform regular expression denial of service attack during authentication.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

python27-python (Red Hat package): 2.7.8-3.el7 - 2.7.17-2.el7

python27-python-pip (Red Hat package): 8.1.2-2.el7

Red Hat Software Collections: 1 for RHEL 7

CPE2.3 External links

http://access.redhat.com/errata/RHSA-2022:1663


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.



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