Missing Required Cryptographic Step Leading to Sensitive Information Disclosure in TYPO3 CMS
CVE-2020-15098

8.8HIGH

Key Information:

Vendor

Typo3

Status
Typo3 Cms
Vendor
CVE Published:
29 July 2020

What is CVE-2020-15098?

In TYPO3 CMS greater than or equal to 9.0.0 and less than 9.5.20, and greater than or equal to 10.0.0 and less than 10.4.6, 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 including potential privilege escalation, insecure deserialization & remote code execution. The overall severity of this vulnerability is high based on mentioned attack chains and the requirement of having a valid backend user session (authenticated). This has been patched in versions 9.5.20 and 10.4.6.

Affected Version(s)

TYPO3 CMS >= 9.0.0, < 9.5.20 < 9.0.0, 9.5.20

TYPO3 CMS >= 10.0.0, 10.4.6 >= 10.0.0, 10.4.6

References

https://github.com/TYPO3/TYPO3.CMS/security/advisories/GH...
x_refsource_CONFIRM
https://typo3.org/security/advisory/typo3-core-sa-2016-013
x_refsource_MISC
https://typo3.org/security/advisory/typo3-core-sa-2020-008
x_refsource_MISC

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.