CVE-2021-40529

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.

Link	Resource
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://github.com/randombit/botan/pull/2790	Patch 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/UPHGYWNJQKWLTUWBNSFB4F66MQDIL3IB/	Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/72NB4OLD3VHJC3YF3PEP2HKF6BYURPAO/	Mailing List Third Party Advisory
https://security.gentoo.org/glsa/202208-14	Third Party Advisory

Configuration 1

cpe:2.3:a:botan_project:botan:*:*:*:*:*:*:*:* cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*

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Published : 2021-09-06 07:15

Updated : 2022-12-09 03:24

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NVD link : CVE-2021-40529

Mitre link : CVE-2021-40529

No products.

CWE-327