What’s Vulnerable › Vulnerabilities
CVE-2023-42811: AEADs/aes-gcm: Plaintext exposed in decrypt_in_place_detached even on tag verification failure
- Severity: medium (CVSS 5.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: yes
- Published: 2023-09-22 · updated 2026-06-17
- Weakness: CWE-347
Description
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 products
- Aes-Gcm Project Aes-Gcm: from 0.10.0 before 0.10.3 — fixed in 0.10.3
- Fedoraproject Fedora: 37, 38, 39
How to fix
Upgrade to a fixed version: Aes-Gcm Project Aes-Gcm 0.10.3. Check the vendor advisory for mitigations.
References
- https://docs.rs/aes-gcm/latest/src/aes_gcm/lib.rs.html#309
- https://github.com/RustCrypto/AEADs/security/advisories/GHSA-423w-p2w9-r7vq
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ROBB6TBDAGEQ2WIINR34F3DPSN3FND6K/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RYQCICN6BVC6I75O3F6W4VK4J3MOYDJU/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U67ZSMNX5V3WTBYPUYF45PSFG4SF5SGF/
- https://docs.rs/aes-gcm/latest/src/aes_gcm/lib.rs.html#309
- https://github.com/RustCrypto/AEADs/security/advisories/GHSA-423w-p2w9-r7vq
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ROBB6TBDAGEQ2WIINR34F3DPSN3FND6K/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RYQCICN6BVC6I75O3F6W4VK4J3MOYDJU/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U67ZSMNX5V3WTBYPUYF45PSFG4SF5SGF/
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