CVE-2020-24455
MEDIUMCVSS 6.7/10EPSS 0.59%
Last modified
CVE-2020-24455 is a medium-severity vulnerability rated 6.7/10 on the CVSS scale. Missing initialization of a variable in the TPM2 source may allow a privileged user to potentially enable an escalation of privilege via local access. This affects tpm2-tss before 3.0.1 and before 2.4.3.. EPSS estimates a 0.59% chance of exploitation in the next 30 days.
Description
Missing initialization of a variable in the TPM2 source may allow a privileged user to potentially enable an escalation of privilege via local access. This affects tpm2-tss before 3.0.1 and before 2.4.3.
Metrics
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Tpm2 Software Stack Project | Tpm2 Software Stack | < 2.4.3 |
| Tpm2 Software Stack Project | Tpm2 Software Stack | >= 3.0.0, < 3.0.1 |
| Fedoraproject | Fedora | 34 |
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1902167Issue Tracking, Patch, Third Party Advisory
- https://github.com/tpm2-software/tpm2-tss/releases/tag/2.4.3Release Notes, Third Party Advisory
- https://github.com/tpm2-software/tpm2-tss/releases/tag/3.0.1Release Notes, Third Party Advisory
- https://security.gentoo.org/glsa/202107-10Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1902167Issue Tracking, Patch, Third Party Advisory
- https://github.com/tpm2-software/tpm2-tss/releases/tag/2.4.3Release Notes, Third Party Advisory
- https://github.com/tpm2-software/tpm2-tss/releases/tag/3.0.1Release Notes, Third Party Advisory
- https://security.gentoo.org/glsa/202107-10Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-24455?
Missing initialization of a variable in the TPM2 source may allow a privileged user to potentially enable an escalation of privilege via local access. This affects tpm2-tss before 3.0.1 and before 2.4.3.
How severe is CVE-2020-24455?
CVE-2020-24455 has a CVSS score of 6.7/10 (MEDIUM severity). The EPSS model estimates a 0.59% probability of exploitation in the next 30 days.
How do I fix CVE-2020-24455?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
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Are you affected by CVE-2020-24455?
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