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Fencer Vulns
medium 5.9

CVE-2023-1255 json

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

published 2023-04-20 3 y ago modified 2026-07-25 3 mo ago also EUVD-2023-23524 , GHSA-4wp2-xw7p-2gfx , JLSEC-2026-238

cvss
5.9
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.0%
EPSS 1.0% chance of exploitation in 30 days, percentile 61%
public exploits
0
none known

Summary

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.

Patch / fix

  • julia OpenSSL_jll 3.0.9+0
  • OpenSSL OpenSSL 3.0.9, 3.1.1
  • openssl Debian 14, Debian 13, Debian 12 3.0.9-1

debian advisories DEBIAN-CVE-2023-1255

  • openssl Ubuntu 22.04 LTS 3.0.2-0ubuntu1.10
  • openssl Ubuntu Pro FIPS-updates 22.04 LTS, Ubuntu Pro FIPS-preview 22.04 LTS 3.0.2-0ubuntu1.10+Fips1

ubuntu advisories UBUNTU-CVE-2023-1255

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • openssl RHEL 9 1:3.0.7-16.el9_2
  • openssl-libs RHEL 9 1:3.0.7-16.el9_2
  • openssl-perl RHEL 9 1:3.0.7-16.el9_2

red hat advisories RHSA-2023:3722

  • openssl-3 SLE Module for Basesystem 15 SP5, openSUSE Leap 15.5 3.0.8-150500.5.3.1
  • openssl-3 SLE Module for Basesystem 15 SP4, openSUSE Leap 15.4 3.0.8-150400.4.26.1

suse advisories SUSE-SU-2023:2620-1SUSE-SU-2023:2470-1

  • openssl-3 openSUSE Tumbleweed 3.1.1-1.1

opensuse advisories openSUSE-SU-2024:12969-1

  • openssl AlmaLinux 9 1:3.0.7-16.el9_2
  • openssl-libs AlmaLinux 9 1:3.0.7-16.el9_2
  • openssl-perl AlmaLinux 9 1:3.0.7-16.el9_2

almalinux advisories ALSA-2023:3722

  • openssl Alpine 3.17 3.0.8-r4
  • openssl Alpine 3.24, Alpine 3.23, Alpine 3.22 +4 more 3.1.0-r4
  • openssl3 Alpine 3.16, Alpine 3.15 3.0.8-r3

alpine advisories ALPINE-CVE-2023-1255

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-1255 updated cvss 5.1

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

  • Red Hat Enterprise Linux AppStream (v. 9) openssl-perl 3.0.7-16.el9_2 Red Hat Enterprise Linux BaseOS (v. 9) openssl 3.0.7-16.el9_2, openssl-libs 3.0.7-16.el9_2
    fixed: vendor fix RHSA-2023:3722
  • Red Hat Enterprise Linux 6 openssl, openssl-perl Red Hat Enterprise Linux 7 ovmf, OVMF, AAVMF, openssl, openssl-libs, openssl-perl Red Hat Enterprise Linux 8 edk2, shim, openssl, shim-x64, edk2-ovmf, shim-aa64, +5 more Red Hat Enterprise Linux 9 edk2, shim, shim-x64, edk2-ovmf, shim-aa64, edk2-tools, +2 more Red Hat JBoss Core Services jbcs-httpd24-openssl Red Hat JBoss Web Server 3 openssl
    +1 more products
    Red Hat JBoss Web Server 5 openssl
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
21 mo ago

Exploit prediction

0.95% chance of exploitation in the next 30 days, higher than 61% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
OSV 3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
julia OpenSSL_jll
>=3.0.8+0, <3.0.9+0
3.0.9+0

Affected products

  • OpenSSL OpenSSL

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.