CVE-2021-40530
CVSS V2 Low 2.6
CVSS V3 Medium 5.9
Description
The ElGamal implementation in Crypto++ through 8.5 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.
Overview
- CVE ID
- CVE-2021-40530
- Assigner
- cve@mitre.org
- Vulnerability Status
- Analyzed
- Published Version
- 2021-09-06T19:15:07
- Last Modified Date
- 2021-10-18T11:58:01
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:cryptopp:crypto\+\+:*:*:*:*:*:*:*:* | 1 | OR | 8.5 | |
| cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* | 1 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:H/Au:N/C:P/I:N/A:N
- Access Vector
- NETWORK
- Access Compatibility
- HIGH
- Authentication
- NONE
- Confidentiality Impact
- PARTIAL
- Integrity Impact
- NONE
- Availability Impact
- NONE
- Base Score
- 2.6
- Severity
- LOW
- Exploitability Score
- 4.9
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
- Attack Vector
- NETWORK
- Attack Compatibility
- HIGH
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- HIGH
- Availability Impact
- NONE
- Base Score
- 5.9
- Base Severity
- MEDIUM
- Exploitability Score
- 2.2
- Impact Score
- 3.6
References
| Reference URL | Reference Tags |
|---|---|
| https://ibm.github.io/system-security-research-updates/2021/07/20/insecurity-elgamal-pt1 | Third Party Advisory |
| https://ibm.github.io/system-security-research-updates/2021/09/06/insecurity-elgamal-pt2 | Exploit Third Party Advisory |
| https://eprint.iacr.org/2021/923 | Technical Description Third Party Advisory |
| https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HGVBZ2TTRKCTYAZTRHTF6OBD4W37F5MT/ | Mailing List Third Party Advisory |
| https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/57OJA2K5AHX5HAU2QBDRWLGIIUX7GASC/ | Mailing List Third Party Advisory |
| https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VJYOZGWI7TD27SEXILSM6VUTPPEICDL7/ | Mailing List Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-40530 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-40530 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 06:51:26 | Added to TrackCVE | |||
| 2022-12-05 09:40:22 | 2021-09-06T19:15Z | 2021-09-06T19:15:07 | CVE Published Date | updated |
| 2022-12-05 09:40:22 | 2021-10-18T11:58:01 | CVE Modified Date | updated | |
| 2022-12-05 09:40:22 | Analyzed | Vulnerability Status | updated |