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
 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

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:L/SI:N/SA:N/E:U/U:Green]

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

https://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

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

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

https://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

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

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

https://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

CVSSv4.0: 0.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

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

https://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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