AEADs/aes-gcm: Plaintext exposed in decrypt_in_place_detached even on tag verification failure
CVE-2023-42811

4.7MEDIUM

Key Information:

Vendor

Rustcrypto

Status
Aeads
Vendor
CVE Published:
22 September 2023

What is CVE-2023-42811?

aes-gcm is a pure Rust implementation of the AES-GCM. Starting in version 0.10.0 and prior to version 0.10.3, in the AES GCM implementation of decrypt_in_place_detached, the decrypted ciphertext (i.e. the correct plaintext) is exposed even if tag verification fails. If a program using the aes-gcm crate's decrypt_in_place* APIs accesses the buffer after decryption failure, it will contain a decryption of an unauthenticated input. Depending on the specific nature of the program this may enable Chosen Ciphertext Attacks (CCAs) which can cause a catastrophic breakage of the cipher including full plaintext recovery. Version 0.10.3 contains a fix for this issue.

Affected Version(s)

AEADs >= 0.10.0, < 0.10.3

References

https://github.com/RustCrypto/AEADs/security/advisories/G...
x_refsource_CONFIRM
https://docs.rs/aes-gcm/latest/src/aes_gcm/lib.rs.html#309
x_refsource_MISC
https://lists.fedoraproject.org/archives/list/package-ann...

CVSS V3.1

Score:
4.7
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
High
Availability:
Low
Attack Vector:
Local
Attack Complexity:
High
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.