CVE-2021-3505
Apache libtpms TPM 2 RSA Key Generation Weakness
Description
A flaw was found in libtpms in versions before 0.8.0. The TPM 2 implementation returns 2048 bit keys with ~1984 bit strength due to a bug in the TCG specification. The bug is in the key creation algorithm in RsaAdjustPrimeCandidate(), which is called before the prime number check. The highest threat from this vulnerability is to data confidentiality.
INFO
Published Date :
April 19, 2021, 9:15 p.m.
Last Modified :
Nov. 7, 2023, 3:38 a.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
3.6
Exploitability Score :
1.8
Affected Products
The following products are affected by CVE-2021-3505
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-3505.
| URL | Resource |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1950046 | Issue Tracking Patch Third Party Advisory |
| https://github.com/stefanberger/libtpms/issues/183 | Exploit Patch Third Party Advisory |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NUCZX4S53TUNTSGTCRDNOQZV2V2RI4RJ/ |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-3505 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-3505 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Nov. 07, 2023
Action Type Old Value New Value Added Reference Red Hat, Inc. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NUCZX4S53TUNTSGTCRDNOQZV2V2RI4RJ/ [No types assigned] Removed Reference Red Hat, Inc. https://lists.fedoraproject.org/archives/list/[email protected]/message/NUCZX4S53TUNTSGTCRDNOQZV2V2RI4RJ/ -
Modified Analysis by [email protected]
Jun. 03, 2021
Action Type Old Value New Value Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/NUCZX4S53TUNTSGTCRDNOQZV2V2RI4RJ/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/NUCZX4S53TUNTSGTCRDNOQZV2V2RI4RJ/ Mailing List, Third Party Advisory Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* -
CVE Modified by [email protected]
May. 05, 2021
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/NUCZX4S53TUNTSGTCRDNOQZV2V2RI4RJ/ [No Types Assigned] -
Initial Analysis by [email protected]
Apr. 27, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:L/AC:L/Au:N/C:P/I:N/A:N) Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=1950046 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=1950046 Issue Tracking, Patch, Third Party Advisory Changed Reference Type https://github.com/stefanberger/libtpms/issues/183 No Types Assigned https://github.com/stefanberger/libtpms/issues/183 Exploit, Patch, Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:libtpms_project:libtpms:*:*:*:*:*:*:*:* versions up to (excluding) 0.8.0 Added CPE Configuration OR *cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-3505 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-3505
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.05 }} -0.00%
score
0.19922
percentile