Vulnerability Details : 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.
Vulnerability category: Input validationExecute codeGain privilegeInformation leak
Products affected by CVE-2020-15098
- cpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:*
- cpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-15098
0.32%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 66 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-15098
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.5
|
MEDIUM | AV:N/AC:L/Au:S/C:P/I:P/A:P |
8.0
|
6.4
|
NIST | |
|
8.8
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
2.8
|
5.9
|
NIST | |
|
8.8
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
2.8
|
5.9
|
GitHub, Inc. |
CWE ids for CVE-2020-15098
-
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.Assigned by: security-advisories@github.com (Secondary)
-
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.Assigned by: security-advisories@github.com (Secondary)
-
The product does not implement a required step in a cryptographic algorithm, resulting in weaker encryption than advertised by the algorithm.Assigned by: security-advisories@github.com (Secondary)
-
The product uses a broken or risky cryptographic algorithm or protocol.Assigned by: nvd@nist.gov (Primary)
-
The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.Assigned by: security-advisories@github.com (Secondary)
References for CVE-2020-15098
-
https://github.com/TYPO3/TYPO3.CMS/commit/85d3e70dff35a99ef53f4b561114acfa9e5c47e1
[SECURITY] Avoid ambiguous HMAC results · TYPO3/TYPO3.CMS@85d3e70 · GitHubBroken Link
-
https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-m5vr-3m74-jwxp
Sensitive Information Disclosure · Advisory · TYPO3/TYPO3.CMS · GitHubThird Party Advisory
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https://typo3.org/security/advisory/typo3-core-sa-2020-008
TYPO3-CORE-SA-2020-008: Sensitive Information DisclosureVendor Advisory
-
https://typo3.org/security/advisory/typo3-core-sa-2016-013
TYPO3-CORE-SA-2016-013: Missing Access Check in TYPO3 CMSVendor Advisory
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