// For flags

CVE-2023-1255

Input buffer over-read in AES-XTS implementation on 64 bit ARM

Severity Score

5.9
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

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.

A vulnerability was found in OpenSSL. This security flaw occurs because the AES-XTS cipher decryption implementation for the 64-bit ARM platform contains an issue that could cause it to read past the input buffer, leading to a crash.

*Credits: Anton Romanov (Amazon), Nevine Ebeid (Amazon)
CVSS Scores
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Local
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2023-03-07 CVE Reserved
  • 2023-04-20 CVE Published
  • 2024-08-02 CVE Updated
  • 2024-09-30 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer
  • CWE-125: Out-of-bounds Read
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Openssl
Search vendor "Openssl"
Openssl
Search vendor "Openssl" for product "Openssl"
>= 3.0.0 < 3.0.9
Search vendor "Openssl" for product "Openssl" and version " >= 3.0.0 < 3.0.9"
-
Affected
Openssl
Search vendor "Openssl"
Openssl
Search vendor "Openssl" for product "Openssl"
>= 3.1.0 < 3.1.1
Search vendor "Openssl" for product "Openssl" and version " >= 3.1.0 < 3.1.1"
-
Affected