CentOS 7 update for python-virtualenv

Published: 2020-03-26 | Updated: 2021-06-20

Risk	High
Patch available	YES
Number of vulnerabilities	3
CVE-ID	CVE-2018-18074 CVE-2018-20060 CVE-2019-11236
CWE-ID	CWE-255 CWE-200 CWE-93
Exploitation vector	Network
Public exploit	Public exploit code for vulnerability #1 is available. Public exploit code for vulnerability #2 is available. Public exploit code for vulnerability #3 is available.
Vulnerable software Subscribe	CentOS Operating systems & Components / Operating system
Vendor	CentOS Project

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Credentials management

EUVDB-ID: #VU19388

Risk: High

CVSSv3.1: 8.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2018-18074

CWE-ID: CWE-255 - Credentials Management

Exploit availability: No

Description

The vulnerability allows a remote attacker to access sensitive information on a targeted system.

The vulnerability exists due to the software does not remove the HTTP Authorization header when following an HTTPS-to-HTTP redirect with the same hostname. A remote attacker who is able to perform a man-in-the-middle attack can sniff network traffic in transit between two systems on the targeted network and access sensitive information, such as user credentials.

Mitigation

Update the affected packages.

Vulnerable software versions

CentOS: 7

External links

http://lists.centos.org/pipermail/centos-announce/2020-March/035680.html

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.

2) Information disclosure

EUVDB-ID: #VU26413

Risk: Medium

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

CVE-ID: CVE-2018-20060

CWE-ID: CWE-200 - Information exposure

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to Authorization HTTP header is not removed from the HTTP request during request redirection in "urllib3/util/retry.py". A remote attacker can intercept the request and gain access to sensitive information, passed via Authorization HTTP header.

Mitigation

Update the affected packages.

Vulnerable software versions

CentOS: 7

External links

http://lists.centos.org/pipermail/centos-announce/2020-March/035680.html

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) CRLF injection

EUVDB-ID: #VU26412

Risk: Medium

CVSSv3.1: 4.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2019-11236

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

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to perform a spoofing attack.

The vulnerability exists due to insufficient filtration of user-supplied data passed via HTTP request parameters to urllib3 library. A remote attacker can pass specially crafted data that contains CRLF sequences and perform a spoofing attack.

Mitigation

Update the affected packages.

Vulnerable software versions

CentOS: 7

External links

http://lists.centos.org/pipermail/centos-announce/2020-March/035680.html

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.