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Vulnerability Details :

CVE-2021-40529

Summary
Assigner-mitre
Assigner Org ID-8254265b-2729-46b6-b9e3-3dfca2d5bfca
Published At-06 Sep, 2021 | 18:45
Updated At-04 Aug, 2024 | 02:44
Rejected At-
Credits

The ElGamal implementation in Botan through 2.18.1, as used in Thunderbird and other products, allows plaintext recovery because, during interaction between two cryptographic libraries, a certain dangerous combination of the prime defined by the receiver's public key, the generator defined by the receiver's public key, and the sender's ephemeral exponents can lead to a cross-configuration attack against OpenPGP.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:mitre
Assigner Org ID:8254265b-2729-46b6-b9e3-3dfca2d5bfca
Published At:06 Sep, 2021 | 18:45
Updated At:04 Aug, 2024 | 02:44
Rejected At:
▼CVE Numbering Authority (CNA)

The ElGamal implementation in Botan through 2.18.1, as used in Thunderbird and other products, allows plaintext recovery because, during interaction between two cryptographic libraries, a certain dangerous combination of the prime defined by the receiver's public key, the generator defined by the receiver's public key, and the sender's ephemeral exponents can lead to a cross-configuration attack against OpenPGP.

Affected Products
Vendor
n/a
Product
n/a
Versions
Affected
  • n/a
Problem Types
TypeCWE IDDescription
textN/An/a
Type: text
CWE ID: N/A
Description: n/a
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://eprint.iacr.org/2021/923
x_refsource_MISC
https://ibm.github.io/system-security-research-updates/2021/07/20/insecurity-elgamal-pt1
x_refsource_MISC
https://ibm.github.io/system-security-research-updates/2021/09/06/insecurity-elgamal-pt2
x_refsource_MISC
https://github.com/randombit/botan/pull/2790
x_refsource_MISC
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UPHGYWNJQKWLTUWBNSFB4F66MQDIL3IB/
vendor-advisory
x_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/72NB4OLD3VHJC3YF3PEP2HKF6BYURPAO/
vendor-advisory
x_refsource_FEDORA
https://security.gentoo.org/glsa/202208-14
vendor-advisory
x_refsource_GENTOO
Hyperlink: https://eprint.iacr.org/2021/923
Resource:
x_refsource_MISC
Hyperlink: https://ibm.github.io/system-security-research-updates/2021/07/20/insecurity-elgamal-pt1
Resource:
x_refsource_MISC
Hyperlink: https://ibm.github.io/system-security-research-updates/2021/09/06/insecurity-elgamal-pt2
Resource:
x_refsource_MISC
Hyperlink: https://github.com/randombit/botan/pull/2790
Resource:
x_refsource_MISC
Hyperlink: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UPHGYWNJQKWLTUWBNSFB4F66MQDIL3IB/
Resource:
vendor-advisory
x_refsource_FEDORA
Hyperlink: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/72NB4OLD3VHJC3YF3PEP2HKF6BYURPAO/
Resource:
vendor-advisory
x_refsource_FEDORA
Hyperlink: https://security.gentoo.org/glsa/202208-14
Resource:
vendor-advisory
x_refsource_GENTOO
▼Authorized Data Publishers (ADP)
CVE Program Container
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://eprint.iacr.org/2021/923
x_refsource_MISC
x_transferred
https://ibm.github.io/system-security-research-updates/2021/07/20/insecurity-elgamal-pt1
x_refsource_MISC
x_transferred
https://ibm.github.io/system-security-research-updates/2021/09/06/insecurity-elgamal-pt2
x_refsource_MISC
x_transferred
https://github.com/randombit/botan/pull/2790
x_refsource_MISC
x_transferred
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UPHGYWNJQKWLTUWBNSFB4F66MQDIL3IB/
vendor-advisory
x_refsource_FEDORA
x_transferred
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/72NB4OLD3VHJC3YF3PEP2HKF6BYURPAO/
vendor-advisory
x_refsource_FEDORA
x_transferred
https://security.gentoo.org/glsa/202208-14
vendor-advisory
x_refsource_GENTOO
x_transferred
Hyperlink: https://eprint.iacr.org/2021/923
Resource:
x_refsource_MISC
x_transferred
Hyperlink: https://ibm.github.io/system-security-research-updates/2021/07/20/insecurity-elgamal-pt1
Resource:
x_refsource_MISC
x_transferred
Hyperlink: https://ibm.github.io/system-security-research-updates/2021/09/06/insecurity-elgamal-pt2
Resource:
x_refsource_MISC
x_transferred
Hyperlink: https://github.com/randombit/botan/pull/2790
Resource:
x_refsource_MISC
x_transferred
Hyperlink: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UPHGYWNJQKWLTUWBNSFB4F66MQDIL3IB/
Resource:
vendor-advisory
x_refsource_FEDORA
x_transferred
Hyperlink: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/72NB4OLD3VHJC3YF3PEP2HKF6BYURPAO/
Resource:
vendor-advisory
x_refsource_FEDORA
x_transferred
Hyperlink: https://security.gentoo.org/glsa/202208-14
Resource:
vendor-advisory
x_refsource_GENTOO
x_transferred
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:cve@mitre.org
Published At:06 Sep, 2021 | 19:15
Updated At:07 Nov, 2023 | 03:38

The ElGamal implementation in Botan through 2.18.1, as used in Thunderbird and other products, allows plaintext recovery because, during interaction between two cryptographic libraries, a certain dangerous combination of the prime defined by the receiver's public key, the generator defined by the receiver's public key, and the sender's ephemeral exponents can lead to a cross-configuration attack against OpenPGP.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Primary3.15.9MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Primary2.02.6LOW
AV:N/AC:H/Au:N/C:P/I:N/A:N
Type: Primary
Version: 3.1
Base score: 5.9
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Type: Primary
Version: 2.0
Base score: 2.6
Base severity: LOW
Vector:
AV:N/AC:H/Au:N/C:P/I:N/A:N
CPE Matches

botan_project
botan_project
>>botan>>Versions up to 2.18.1(inclusive)
cpe:2.3:a:botan_project:botan:*:*:*:*:*:*:*:*
Fedora Project
fedoraproject
>>fedora>>34
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
Fedora Project
fedoraproject
>>fedora>>35
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
Mozilla Corporation
mozilla
>>thunderbird>>Versions before 91.12.0(exclusive)
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-327Primarynvd@nist.gov
CWE ID: CWE-327
Type: Primary
Source: nvd@nist.gov
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://eprint.iacr.org/2021/923cve@mitre.org
Technical Description
Third Party Advisory
https://github.com/randombit/botan/pull/2790cve@mitre.org
Patch
Third Party Advisory
https://ibm.github.io/system-security-research-updates/2021/07/20/insecurity-elgamal-pt1cve@mitre.org
Third Party Advisory
https://ibm.github.io/system-security-research-updates/2021/09/06/insecurity-elgamal-pt2cve@mitre.org
Exploit
Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/72NB4OLD3VHJC3YF3PEP2HKF6BYURPAO/cve@mitre.org
N/A
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UPHGYWNJQKWLTUWBNSFB4F66MQDIL3IB/cve@mitre.org
N/A
https://security.gentoo.org/glsa/202208-14cve@mitre.org
Third Party Advisory
Hyperlink: https://eprint.iacr.org/2021/923
Source: cve@mitre.org
Resource:
Technical Description
Third Party Advisory
Hyperlink: https://github.com/randombit/botan/pull/2790
Source: cve@mitre.org
Resource:
Patch
Third Party Advisory
Hyperlink: https://ibm.github.io/system-security-research-updates/2021/07/20/insecurity-elgamal-pt1
Source: cve@mitre.org
Resource:
Third Party Advisory
Hyperlink: https://ibm.github.io/system-security-research-updates/2021/09/06/insecurity-elgamal-pt2
Source: cve@mitre.org
Resource:
Exploit
Third Party Advisory
Hyperlink: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/72NB4OLD3VHJC3YF3PEP2HKF6BYURPAO/
Source: cve@mitre.org
Resource: N/A
Hyperlink: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UPHGYWNJQKWLTUWBNSFB4F66MQDIL3IB/
Source: cve@mitre.org
Resource: N/A
Hyperlink: https://security.gentoo.org/glsa/202208-14
Source: cve@mitre.org
Resource:
Third Party Advisory

Change History

0
Information is not available yet

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