Bug 2020536 (CVE-2021-43398) - CVE-2021-43398 cryptopp: a timing leakage may lead to information disclosure
Summary: CVE-2021-43398 cryptopp: a timing leakage may lead to information disclosure
Alias: CVE-2021-43398
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 2020537 2020538
TreeView+ depends on / blocked
Reported: 2021-11-05 08:37 UTC by Marian Rehak
Modified: 2022-01-03 14:23 UTC (History)
4 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Last Closed: 2021-11-05 09:09:24 UTC

Attachments (Terms of Use)

Description Marian Rehak 2021-11-05 08:37:57 UTC
A timing leakage in MakePublicKey(). There is a clear correlation between execution time and private key length, which may cause disclosure of the length information of the private key. This might allow attackers to conduct timing attacks.

Upstream Issue:


Comment 1 Marian Rehak 2021-11-05 08:38:14 UTC
Created cryptopp tracking bugs for this issue:

Affects: epel-all [bug 2020538]
Affects: fedora-all [bug 2020537]

Comment 2 Product Security DevOps Team 2021-11-05 09:09:23 UTC
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.

Comment 3 Nicolas Chauvet (kwizart) 2022-01-03 14:23:01 UTC
FY Upstream as closed this as notabug

As "key lengh value" isn't a sensible information as I understand.

Note You need to log in before you can comment on or make changes to this bug.