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Out-of-bounds Read Affecting openssl package, versions <3.0.9-1

0.0
medium

Snyk CVSS

    Attack Complexity High
    Availability High

    Threat Intelligence

    EPSS 0.08% (33rd percentile)
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NVD
5.9 medium
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SUSE
5.5 medium
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Red Hat
5.1 medium

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  • Snyk ID SNYK-DEBIAN12-OPENSSL-5438693
  • published 21 Apr 2023
  • disclosed 20 Apr 2023
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Introduced: 20 Apr 2023

CVE-2023-1255 Open this link in a new tab
CWE-125 Open this link in a new tab

How to fix?

Upgrade Debian:12 openssl to version 3.0.9-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssl package and not the openssl package as distributed by Debian. See How to fix? for Debian:12 relevant fixed versions and status.

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.