Multiple vulnerabilities in Typo3



Published: 2019-06-25
Risk High
Patch available YES
Number of vulnerabilities 7
CVE-ID CVE-2019-12748
CVE-2019-12747
CVE-2019-10912
CWE-ID CWE-79
CWE-284
CWE-94
CWE-502
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
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TYPO3
Web applications / CMS

Vendor TYPO3

Security Bulletin

This security bulletin contains information about 7 vulnerabilities.

1) Cross-site scripting

EUVDB-ID: #VU18903

Risk: Medium

CVSSv3.1: 5.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2019-12748

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 t3:// URL handling functionality. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script 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.

PoC:

t3://url/?url=javascript:alert(1);

Mitigation

Install updates from vendor's website.

Vulnerable software versions

TYPO3: 8.3.0 - 9.5.7

External links

http://typo3.org/security/advisory/typo3-core-sa-2019-015/


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) Improper access control

EUVDB-ID: #VU18901

Risk: Low

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

CVE-ID: N/A

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

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

The vulnerability exists due to improper access restrictions when uploading files via the Import/Export module. A remote authenticated user can bypass ACL restrictions and access import functionality.

This vulnerability does not allow uploading of dangerous files, but can be used in conjunction with other issues to elevate privileges within the application using other vulnerabilities.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

TYPO3: 9.3.0 - 9.5.7

External links

http://typo3.org/security/advisory/typo3-core-sa-2019-017/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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

3) Authorization bypass through user-controlled key

EUVDB-ID: #VU18904

Risk: Low

CVSSv3.1: 3.3 [CVSS:3.1/AV:P/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: N/A

Exploit availability: No

Description

The vulnerability allows a local user to gain access to another user's session.

The vulnerability exists due to the application does not delete the session identifier after user logs out and stores it in cookies. An attacker with access to victim's browser can obtain session identifier and gain access to victim's account.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

TYPO3: 8.5.0 - 9.5.7

External links

http://typo3.org/security/advisory/typo3-core-sa-2019-018/


Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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

4) Code Injection

EUVDB-ID: #VU18906

Risk: Medium

CVSSv3.1: 6.3 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

Exploit availability: No

Description

The vulnerability allows a remote authenticated attacker to execute arbitrary code on the target system.

The vulnerability exists due to improper input validation within the backend API (ext:backend) configuration using Page TSconfig. A remote authenticated attacker with access to modify values for fields pages.TSconfig and pages.tsconfig_includes can send a specially crafted request and execute arbitrary PHP or JavaScript code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

TYPO3: 8.0.0 - 9.5.7

External links

http://typo3.org/security/advisory/typo3-core-sa-2019-019/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

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

5) Deserialization of Untrusted Data

EUVDB-ID: #VU18907

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-12747

CWE-ID: CWE-502 - Deserialization of Untrusted Data

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to insecure input validation when processing serialized data within the FormEngine and DataHandle. A remote authenticated attacker can pass specially crafted data to the application and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

TYPO3: 8.0.0 - 9.5.7

External links

http://typo3.org/security/advisory/typo3-core-sa-2019-020/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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

6) Improper access control

EUVDB-ID: #VU18908

Risk: Low

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

CVE-ID: N/A

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

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

The vulnerability exists due to improper access restrictions within the element information component used to display properties of a certain record. A remote authenticated attacker can gain access to potentially sensitive information, such as list of reference forms or records. 

Mitigation

Install updates from vendor's website.

Vulnerable software versions

TYPO3: 8.0.0 - 9.5.7

External links

http://typo3.org/security/advisory/typo3-core-sa-2019-014/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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

7) Insecure deserialization

EUVDB-ID: #VU18299

Risk: Medium

CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-10912

CWE-ID: CWE-502 - Deserialization of Untrusted Data

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to insecure call of the unserialize() PHP function in untrusted user-input. A remote attacker can send specially crafted HTTP request to the affected system and delete arbitrary files on the system or display raw data output.

Mitigation

The vulnerability is caused by usage of a third-party component symfony/cache.

Update to version 9.5.8.

Vulnerable software versions

TYPO3: 9.4.0 - 9.5.7

External links

http://typo3.org/security/advisory/typo3-core-sa-2019-016/


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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