high
8.8
CWE
327 20 200 325 502
Advisory Published
CVE Published
Updated

CVE-2020-15098: Input Validation

First published: Tue Jul 28 2020(Updated: )

> ### Meta > * CVSS: `CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C` (8.2) > * CWE-325, CWE-20, CWE-200, CWE-502 ### Problem It has been discovered that an internal verification mechanism can be used to generate arbitrary checksums. This allows to inject arbitrary data having a valid cryptographic message authentication code (HMAC-SHA1) and can lead to various attack chains as described below. * [TYPO3-CORE-SA-2020-007](https://typo3.org/security/advisory/typo3-core-sa-2020-007), [CVE-2020-15099](https://nvd.nist.gov/vuln/detail/CVE-2020-15099): Potential Privilege Escalation + the database server used for a TYPO3 installation must be accessible for an attacker (either via internet or shared hosting network) + `CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C` (7.5, high) * [TYPO3-CORE-SA-2016-013](https://typo3.org/security/advisory/typo3-core-sa-2016-013), [CVE-2016-5091](https://nvd.nist.gov/vuln/detail/CVE-2016-5091): Insecure Deserialization & Remote Code Execution + an attacker must have access to at least one Extbase plugin or module action in a TYPO3 installation + `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C` (9.1, critical) The overall severity of this vulnerability is **high (8.2)** based on mentioned attack chains and the requirement of having a valid backend user session (authenticated). ### Solution Update to TYPO3 versions 9.5.20 or 10.4.6 that fix the problem described. ### Credits Thanks to TYPO3 security team member Oliver Hader who reported and fixed the issue. ### References * [TYPO3-CORE-SA-2020-008](https://typo3.org/security/advisory/typo3-core-sa-2020-008)

Credit: security-advisories@github.com security-advisories@github.com

Affected SoftwareAffected VersionHow to fix
composer/typo3/cms>=10.0.0<10.4.6>=9.0.0<9.5.20
composer/typo3/cms-core>=10.0.0<10.4.6>=9.0.0<9.5.20
Typo3 Typo3>=9.0.0<9.5.20
Typo3 Typo3>=10.0.0<10.4.6
composer/typo3/cms>=9.0.0<9.5.20
9.5.20
composer/typo3/cms>=10.0.0<10.4.6
10.4.6
composer/typo3/cms-core>=10.0.0<10.4.6
10.4.6
composer/typo3/cms-core>=9.0.0<9.5.20
9.5.20

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Reference Links

Frequently Asked Questions

  • What is CVE-2020-15098?

    CVE-2020-15098 is a vulnerability in TYPO3 CMS that allows sensitive information disclosure.

  • What is the severity of CVE-2020-15098?

    The severity of CVE-2020-15098 is high, with a CVSS score of 8.8.

  • Which versions of TYPO3 CMS are affected by CVE-2020-15098?

    TYPO3 CMS versions 9.0.0 to 9.5.20 and versions 10.0.0 to 10.4.6 are affected by CVE-2020-15098.

  • How can this vulnerability be exploited?

    This vulnerability can be exploited by using an internal verification mechanism to generate arbitrary checksums and inject arbitrary data.

  • How can I fix CVE-2020-15098?

    To fix CVE-2020-15098, it is recommended to upgrade TYPO3 CMS to version 9.5.20 or 10.4.6, depending on the installed version.

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