Debian update for symfony

1) Support for legacy HTTP methods

EUVDB-ID: #VU14165

Risk: Low

CVSSv3.1: 5.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-14773

CWE-ID: CWE-749 - Exposed Dangerous Method or Function

Exploit availability: No

Description

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

The vulnerability exists due to Symfony HttpFoundation component includes support for legacy Microsoft IIS headers X-Original-URL and X-Rewrite-URL. A remote attacker can send a specially crafted HTTP request to the vulnerable application requesting one URL but have Symphony return a different one. An attacker can abuse X-Original-URL and X-Rewrite-URL headers to access otherwise restricted functionality and bypass restrictions on higher level caches and web servers.

Mitigation

Update the affected package to version: 2.8.7+dfsg-1.3+deb9u2

Vulnerable software versions

symfony (Debian package): 2.8.7+dfsg-1.3 - 2.8.7+dfsg-1.3+deb9u1

External links

http://www.debian.org/security/2019/dsa-4441

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) Improper input validation

EUVDB-ID: #VU16614

Risk: High

CVSSv3.1: 8.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-19789

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The vulnerability exists due to an error when using the scalar type hint `string` in a setter method (e.g. `setName(string $name)`) of a class that's the `data_class` of a form A remote unauthenticated attacker can submit a file upload to the corresponding field instead of a normal text input, call `UploadedFile::__toString()` which will then return and disclose the path of the uploaded file. If combined with a local file inclusion issue in certain circumstances a remote attacker can execute arbitrary code with elevated privileges.

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

Mitigation

Update the affected package to version: 2.8.7+dfsg-1.3+deb9u2

Vulnerable software versions

symfony (Debian package): 2.8.7+dfsg-1.3 - 2.8.7+dfsg-1.3+deb9u1

External links

http://www.debian.org/security/2019/dsa-4441

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) Open redirect

EUVDB-ID: #VU16615

Risk: Low

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

CVE-ID: CVE-2018-19790

CWE-ID: CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')

Exploit availability: No

Description

The vulnerability allows a remote unauthenticated attacker to redirect the target user to external websites.

The weakness exists due to improper sanitization of user-supplied data. A remote attacker can use backslashes in the `_failure_path` input field of login forms, work around the redirection target restrictions and effectively redirect the user to any domain after login.

Mitigation

Update the affected package to version: 2.8.7+dfsg-1.3+deb9u2

Vulnerable software versions

symfony (Debian package): 2.8.7+dfsg-1.3 - 2.8.7+dfsg-1.3+deb9u1

External links

http://www.debian.org/security/2019/dsa-4441

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) Cross-site scripting

EUVDB-ID: #VU18296

Risk: Medium

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

CVE-ID: CVE-2019-10909

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 form theme of the PHP templating engine. 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.

Mitigation

Update the affected package to version: 2.8.7+dfsg-1.3+deb9u2

Vulnerable software versions

symfony (Debian package): 2.8.7+dfsg-1.3 - 2.8.7+dfsg-1.3+deb9u1

External links

http://www.debian.org/security/2019/dsa-4441

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.

5) Code injection

EUVDB-ID: #VU18297

Risk: High

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

CVE-ID: CVE-2019-10910

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

Exploit availability: No

Description

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

The vulnerability exists due to insufficient sanitization of user-supplied data related to service identifiers. A remote attacker can send specially crafted HTTP request to the affected system and execute arbitrary PHP code.

Successful exploitation of this vulnerability may allow a remote attacker to compromise the affected application.

Mitigation

Update the affected package to version: 2.8.7+dfsg-1.3+deb9u2

Vulnerable software versions

symfony (Debian package): 2.8.7+dfsg-1.3 - 2.8.7+dfsg-1.3+deb9u1

External links

http://www.debian.org/security/2019/dsa-4441

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.

6) Improper authentication

EUVDB-ID: #VU18298

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-10911

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to the way application handles values within HTTP cookies, related to session expiration time and username. A remote attacker can modify the remember me cookie value and authenticate as a different user.

This attack is only possible if remember me functionality is enabled and the two users share a password hash or the password hashes (e.g. UserInterface::getPassword()) are null for all users (which is valid if passwords are checked by an external system, e.g. an SSO).

Mitigation

Update the affected package to version: 2.8.7+dfsg-1.3+deb9u2

Vulnerable software versions

symfony (Debian package): 2.8.7+dfsg-1.3 - 2.8.7+dfsg-1.3+deb9u1

External links

http://www.debian.org/security/2019/dsa-4441

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

Update the affected package to version: 2.8.7+dfsg-1.3+deb9u2

Vulnerable software versions

symfony (Debian package): 2.8.7+dfsg-1.3 - 2.8.7+dfsg-1.3+deb9u1

External links

http://www.debian.org/security/2019/dsa-4441

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.

8) Improper input validation

EUVDB-ID: #VU18300

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-10913

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The vulnerability exists due to absent validation of HTTP methods when processing methods directly or via X-Http-Method-Override header. A remote attacker can pass specially crafted string as HTTP method and bypass certain security restrictions.

Mitigation

Update the affected package to version: 2.8.7+dfsg-1.3+deb9u2

Vulnerable software versions

symfony (Debian package): 2.8.7+dfsg-1.3 - 2.8.7+dfsg-1.3+deb9u1

External links

http://www.debian.org/security/2019/dsa-4441

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.