CVE-2023-1255

Description

Issue summary: The AES-XTS cipher decryption implementation for 64 bit ARM platform contains a bug that could cause it to read past the input buffer, leading to a crash. Impact summary: Applications that use the AES-XTS algorithm on the 64 bit ARM platform can crash in rare circumstances. The AES-XTS algorithm is usually used for disk encryption. The AES-XTS cipher decryption implementation for 64 bit ARM platform will read past the end of the ciphertext buffer if the ciphertext size is 4 mod 5 in 16 byte blocks, e.g. 144 bytes or 1024 bytes. If the memory after the ciphertext buffer is unmapped, this will trigger a crash which results in a denial of service. If an attacker can control the size and location of the ciphertext buffer being decrypted by an application using AES-XTS on 64 bit ARM, the application is affected. This is fairly unlikely making this issue a Low severity one.

How to fix CVE-2023-1255

To remediate CVE-2023-1255, upgrade the affected package to a fixed version below.

• —upgrade to 3.0.8-r4 or later
• —upgrade to 3.0.8-r3 or later
• —upgrade to 3.0.9-1 or later

Is CVE-2023-1255 being exploited?

Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.

Affected packages (3)

• from 0, < 3.0.8-r4
• from 0, < 3.0.8-r3
• from 0, < 3.0.9-1

CVSS scores

References (2)

• ADVISORYsecurity.alpinelinux.org/vuln/CVE-2023-1255
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2023-1255