Multiple vulnerabilities in Oracle Communications Evolved Communications Application Server



Published: 2021-07-21 | Updated: 2022-04-21
Risk Medium
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2020-17521
CVE-2019-10086
CVE-2020-25649
CWE-ID CWE-276
CWE-693
CWE-611
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Oracle Communications Evolved Communications Application Server
Server applications / Application servers

Vendor Oracle

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Incorrect default permissions

EUVDB-ID: #VU48792

Risk: Low

CVSSv3.1: 3.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-17521

CWE-ID: CWE-276 - Incorrect Default Permissions

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to incorrect default permissions for temporary files and folders that are set by the application. A local user with access to the system can view contents of files and directories or modify them.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Oracle Communications Evolved Communications Application Server: 7.1

External links

http://www.oracle.com/security-alerts/cpujul2021.html?534786


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Protection mechanism failure

EUVDB-ID: #VU20844

Risk: Low

CVSSv3.1: 3.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-10086

CWE-ID: CWE-693 - Protection Mechanism Failure

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass certain security restrictions.

The vulnerability exist due to Beanutils is not using by default the a special BeanIntrospector class in PropertyUtilsBean that was supposed to suppress the ability for an attacker to access the classloader via the class property available on all Java objects. A remote attacker can abuse such application behavior against applications that were developed to rely on this security feature.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Oracle Communications Evolved Communications Application Server: 7.1

External links

http://www.oracle.com/security-alerts/cpujul2021.html?534786


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) XML External Entity injection

EUVDB-ID: #VU48979

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-2020-25649

CWE-ID: CWE-611 - Improper Restriction of XML External Entity Reference ('XXE')

Exploit availability: No

Description

The vulnerability allows a remote attacker to modify information on the system.

The vulnerability exists due to insufficient validation of user-supplied XML input. A remote attacker can pass a specially crafted XML code to the affected application and modify information on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Oracle Communications Evolved Communications Application Server: 7.1

External links

http://www.oracle.com/security-alerts/cpujul2021.html?534786


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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