UBUNTU-CVE-2021-40529
See a problem?- Source
- https://ubuntu.com/security/notices/UBUNTU-CVE-2021-40529
- Import Source
- https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-40529.json
- JSON Data
- https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-40529
- Related
- Published
- 2021-09-06T19:15:00Z
- Modified
- 2021-09-06T19:15:00Z
- Severity
-
- 5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
- Summary
- [none]
- Details
-
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.
- References
-
- https://ubuntu.com/security/CVE-2021-40529
- https://eprint.iacr.org/2021/923
- https://github.com/randombit/botan/pull/2790
- https://ibm.github.io/system-security-research-updates/2021/07/20/insecurity-elgamal-pt1
- https://ibm.github.io/system-security-research-updates/2021/09/06/insecurity-elgamal-pt2
- https://www.cve.org/CVERecord?id=CVE-2021-40529
Affected packages
Ubuntu:Pro:14.04:LTS / botan1.10
Package
- Name
- botan1.10
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affected
Ubuntu:Pro:16.04:LTS / botan1.10
Package
- Name
- botan1.10
Ubuntu:Pro:18.04:LTS / botan
Package
- Name
- botan
Ubuntu:Pro:18.04:LTS / botan1.10
Package
- Name
- botan1.10
Ubuntu:20.04:LTS / botan
Package
- Name
- botan