CVE-2025-27498

MEDIUM

ascon_aead < 0.4.3 - Improper Verification of Cryptographic Signature

Title source: llm
STIX 2.1

Description

aes-gcm is a pure Rust implementation of the AES-GCM. In decrypt_in_place_detached, the decrypted ciphertext (which is the correct ciphertext) is exposed even if the tag is incorrect. This is because in decrypt_inplace in asconcore.rs, tag verification causes an error to be returned with the plaintext contents still in buffer. The vulnerability is fixed in 0.4.3.

References (2)

Core 2

Scores

CVSS v4 5.6
EPSS 0.0012
EPSS Percentile 1.9%
CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:A/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-347
Status published
Products (2)
crates.io/ascon_aead 0 - 0.4.3crates.io
RustCrypto/AEADs < 0.4.3
Published Mar 03, 2025
Tracked Since Feb 18, 2026