RUSTSEC-2021-0057

Integer overflow in CipherUpdate

Reported

May 1, 2021

Issued

May 1, 2021 (last modified: June 13, 2023)

Package

openssl-src (crates.io)

Type

Vulnerability

Categories

denial-of-service

Aliases

References

https://www.openssl.org/news/secadv/20210216.txt

CVSS Score

7.5 HIGH

CVSS Details

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: None
Availability: High

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Patched

>=111.14

Description

Calls to EVP_CipherUpdate, EVP_EncryptUpdate and EVP_DecryptUpdate may overflow the output length argument in some cases where the input length is close to the maximum permissable length for an integer on the platform. In such cases the return value from the function call will be 1 (indicating success), but the output length value will be negative. This could cause applications to behave incorrectly or crash.

Advisory available under CC0-1.0 license.