Every CVE Search/ Get API key

CVE-2020-24455

Missing initialization of a variable in the TPM2 source may allow a privileged user to...

6.7 MediumFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
High
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

0.58%Down 0.2 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 6.7

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.

Record
CVE-2020-24455
CVSS 3.1
6.7 MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0
4.6 MediumAV:L/AC:L/Au:N/C:P/I:P/A:P
Weakness
CWE-909
Updated
2026-11-02
CVE List No score

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.

Record
CVE-2020-24455
Updated
2026-11-02
EUVDEUVD-2020-17175 No score

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.

Record
EUVD-2020-17175
Updated
2026-11-03
GitHub AdvisoriesGHSA-qh4p-3mhw-2cp7 6.7

Missing initialization of a variable in the TPM2 source may allow a privileged user to...

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.

Record
GHSA-qh4p-3mhw-2cp7
CVSS 3.1
6.7 MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-909
Updated
2026-11-02
OSVAZL-6924 6.7

CVE-2020-24455 affecting package tpm2-tss for versions less than 2.4.6-1

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.

Record
AZL-6924
CVSS 3.1
6.7 MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVBELL-CVE-2020-24455 6.7

CVE-2020-24455 does not affect BellSoft software

Record
BELL-CVE-2020-24455
CVSS 3.1
6.7 MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
Show 5 moreShow less
OSV 6.7

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.

Record
CVE-2020-24455
CVSS 3.1
6.7 MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2020-24455 6.7

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.

Record
DEBIAN-CVE-2020-24455
CVSS 3.1
6.7 MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVOESA-2021-1016 4.1

tpm2-tss security update

tpm2-tss is a software stack supporting Trusted Platform Module(TPM) 2.0 system APIs which provides TPM2.0 specified APIs for applications to access TPM module through kernel TPM drivers.\r\n\r\n Security Fix(es):\r\n\r\n No description is available for this CVE.(CVE-2020-24455)\r\n\r\n

Record
OESA-2021-1016
CVSS 3.1
4.1 MediumCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVMGASA-2020-0417 No score

Updated tpm2-tss packages fix a security vulnerability

FAPI PolicyPCR not instatiating correctly (CVE-2020-24455).

Note that all TPM object created with a PolicyPCR with the currentPcrs and currentPcrsAndBank options have been created with an incorrect policy that omits PCR checks. All such objects have to be recreated.

The tpm2-tss package has been updated to version 2.4.3, which includes a fix for this issue and several other changes. See the upstream release announcements for details.

Record
MGASA-2020-0417
Updated
2026-11-02
OSVopenSUSE-SU-2024:11470-1 No score

libtss2-esys0-3.1.0-1.2 on GA media

These are all security issues fixed in the libtss2-esys0-3.1.0-1.2 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:11470-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
tpm2-tss
Azure Linux:2
 before 2.4.6-1
2.4.6-1
tpm2-tss
Debian:12
 before 3.0.1-1
3.0.1-1
tpm2-tss
Debian:13
 before 3.0.1-1
3.0.1-1
tpm2-tss
Debian:14
 before 3.0.1-1
3.0.1-1
tpm2-tss
Mageia:7
 before 2.4.3-1.mga7
2.4.3-1.mga7
tpm2-tss
openEuler:20.03-LTS
 before 2.4.1-2.oe1
2.4.1-2.oe1
tpm2-tss
openEuler:20.03-LTS-SP1
 before 2.4.1-2.oe1
2.4.1-2.oe1
tpm2-0-tss
openSUSE:Tumbleweed
 before 3.1.0-1.2
3.1.0-1.2

History

History
RecordedChangedSources
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-24455 is a medium vulnerability (CVSS 6.7) in Fedoraproject Fedora, published November 13, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.58%, the 48th percentile. Fixed in tpm2-tss 2.4.6-1.

References

Show 10 moreShow less
Pages All vulnerabilities Browse Docs Sources Guide Get API key
MoveEnter Open