Red Hat Enterprise Linux 8 update for pcs



| Updated: 2025-01-23
Risk Medium
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2020-11023
CVE-2020-7656
CWE-ID CWE-79
Exploitation vector Network
Public exploit Vulnerability #1 is being exploited in the wild.
Public exploit code for vulnerability #2 is available.
Vulnerable software
 pcs (Red Hat package)
Operating systems & Components / Operating system package or component

Vendor Red Hat Inc.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Cross-site scripting

EUVDB-ID: #VU27519

Risk: Low

CVSSv4.0: 2.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:A/U:Clear]

CVE-ID: CVE-2020-11023

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: Yes

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data when passing <option> elements to jQuery’s DOM manipulation methods. A remote attacker can execute arbitrary JavaScript code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

pcs (Red Hat package): before 0.10.10-4.el8

CPE2.3 External links

https://access.redhat.com/errata/RHSA-2021:4142


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?

Yes. This vulnerability is being exploited in the wild.

2) Cross-site scripting

EUVDB-ID: #VU28228

Risk: Medium

CVSSv4.0: 2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P/U:Green]

CVE-ID: CVE-2020-7656

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data within the load() function. A remote attacker can pass specially crafted HTML code to the application and execute it in browser in security context of the affected website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

PoC:

index.html:

<html>
<head>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.8.3/jquery.js"></script>
</head>
<body>
    <div id="mydiv"></div>
    <script>
        $("#mydiv").load('inject.html #himom');
    </script>
</body>
</html>

inject.html:

<div id="himom"><script>alert('Arbitrary Code Execution');</script ></div>

Mitigation

Install updates from vendor's website.

Vulnerable software versions

pcs (Red Hat package): before 0.10.10-4.el8

CPE2.3 External links

https://access.redhat.com/errata/RHSA-2021:4142


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.



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