VulnerabilityModified

CVE-2020-15098

HIGH 8.8EPSS 2.23%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (2.23%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

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.

CVSS 3.1: 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS: 2.23% probability · 82th percentile
CISA KEV: Not listed
Weakness: CWE-20, CWE-200, CWE-325, CWE-502, CWE-327
Affected: typo3/typo3
Source: security-advisories@github.com

References

https://github.com/TYPO3/TYPO3.CMS/commit/85d3e70dff35a99ef53f4b561114acfa9e5c47e1Broken Link
https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-m5vr-3m74-jwxpThird Party Advisory
https://typo3.org/security/advisory/typo3-core-sa-2016-013Vendor Advisory
https://typo3.org/security/advisory/typo3-core-sa-2020-008Vendor Advisory
https://github.com/TYPO3/TYPO3.CMS/commit/85d3e70dff35a99ef53f4b561114acfa9e5c47e1Broken Link
https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-m5vr-3m74-jwxpThird Party Advisory
https://typo3.org/security/advisory/typo3-core-sa-2016-013Vendor Advisory
https://typo3.org/security/advisory/typo3-core-sa-2020-008Vendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.