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Debian Linux CVE-2023-20593

MEDIUM
Error Message Information Leak (CWE-209)
2023-07-24 psirt@amd.com
Information Disclosure Debian Amd Debian Linux Xen Ryzen Threadripper 3960X Firmware Ryzen Threadripper 3970X Firmware Ryzen Threadripper 3990X Firmware Ryzen 3 3100 Firmware Ryzen 3 3300X Firmware Ryzen 5 3500 Firmware Ryzen 5 3500X Firmware Ryzen 5 3600 Firmware Ryzen 5 3600X Firmware Ryzen 5 3600Xt Firmware Ryzen 7 3700X Firmware Ryzen 7 3800X Firmware Ryzen 7 3800Xt Firmware Ryzen 9 3900 Firmware Ryzen 9 3900X Firmware Ryzen 9 3900Xt Firmware Ryzen 9 3950X Firmware Ryzen 9 Pro 3900 Firmware Ryzen 7 4700G Firmware Ryzen 5 4600G Firmware Ryzen 3 4300G Firmware Ryzen 7 4700Ge Firmware Ryzen 5 4600Ge Firmware Ryzen 3 4300Ge Firmware Ryzen 7 5700U Firmware Ryzen 5 5500U Firmware Ryzen 3 5300U Firmware Athlon Gold 7220U Firmware Epyc 7232P Firmware Epyc 7302P Firmware Epyc 7402P Firmware Epyc 7502P Firmware Epyc 7702P Firmware Epyc 7252 Firmware Epyc 7262 Firmware Epyc 7272 Firmware Epyc 7282 Firmware Epyc 7302 Firmware Epyc 7352 Firmware Epyc 7402 Firmware Epyc 7452 Firmware Epyc 7502 Firmware Epyc 7532 Firmware Epyc 7542 Firmware Epyc 7552 Firmware Epyc 7642 Firmware Epyc 7662 Firmware Epyc 7702 Firmware Epyc 7742 Firmware Epyc 7H12 Firmware Epyc 7F32 Firmware Epyc 7F52 Firmware Epyc 7F72 Firmware Ryzen Threadripper Pro 3945Wx Firmware Ryzen Threadripper Pro 3955Wx Firmware Ryzen Threadripper Pro 3975Wx Firmware Ryzen Threadripper Pro 3995Wx Firmware Ryzen 3 Pro 4450U Firmware Ryzen 3 Pro 4350Ge Firmware Ryzen 3 Pro 4350G Firmware Ryzen 3 Pro 4200G Firmware Ryzen 5 Pro 4650Ge Firmware Ryzen 5 Pro 4650G Firmware Ryzen 5 Pro 4400G Firmware Ryzen 7 Pro 4750U Firmware Ryzen 7 Pro 4750Ge Firmware Ryzen 7 Pro 4750G Firmware Ryzen 5 7520U Firmware Ryzen 3 7320U Firmware
5.5
CVSS 3.1 · NVD
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Vulnerability Assessment

Weakness
CWE
CWE-209
OWASP Top 10:2025
A10:2025 - Mishandling of Exceptional Conditions
ASVS 5.0
V16 - Security Logging and Error Handling Error message sanitization
MITRE ATT&CK

1 technique across 1 tactic: Discovery

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

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Impact

CVSS score of 5.5 (MEDIUM). Attack characteristics: local attack vector, low complexity, low privileges required, no user interaction not required. Public proof-of-concept exploit code is available.
Exploit ScenarioDerived

Successful exploitation could compromise the medium-severity affected system.
This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 5.8% exploitation probability (EPSS)

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AnalysisAI

An issue in “Zen 2” CPUs, under specific microarchitectural circumstances, may allow an attacker to potentially access sensitive information. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. Public exploit code available.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

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Technical ContextAI · show details

This vulnerability is classified under CWE-209. An issue in “Zen 2” CPUs, under specific microarchitectural circumstances, may allow an attacker to potentially access sensitive information. Affected products include: Xen, Debian Debian Linux, Amd Ryzen 3 3100 Firmware, Amd Ryzen 3 3300X Firmware, Amd Ryzen 5 3500 Firmware.

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  • Exploit and PoC references, threat intelligence from 22 sources
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Severity by source

NVD PRIMARY 5.5 MEDIUM
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

DescriptionNVD

An issue in “Zen 2” CPUs, under specific microarchitectural circumstances, may allow an attacker to potentially access sensitive information.

Threat Intelligence Overview

EPSS Score
5.8%
Top 8% exploitable
Exploit
POC
Public exploit code exists
Data Quality
2 sources
Confidence: Low
NVD CVE.org EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC Yes
EPSS 5.8%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
Poc
System Exposure· derived
Small
Automatable· derived
No
Human Impact· derived
Medium

Priority Score

54
Low Medium High Critical
KEV: 0
EPSS: +6
CVSS: +28
PoC: +20
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

Affected Products (CPE)NVD

cpe:2.3:o:xen:xen:4.14.0:*:*:*:*:*:x86:*
cpe:2.3:o:xen:xen:4.15.0:*:*:*:*:*:x86:*
cpe:2.3:o:xen:xen:4.16.0:*:*:*:*:*:x86:*
cpe:2.3:o:xen:xen:4.17.0:*:*:*:*:*:x86:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3100_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3300x_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_3500_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_3500x_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_3600_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_3600x_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_3600xt_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_7_3700x_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_7_3800x_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_7_3800xt_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_9_3900_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_9_3900x_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_9_3900xt_firmware:-:*:*:*:*:*:*:*
+ 56 more

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References

Advisories & patches
PATCH http://www.openwall.com/lists/oss-security/2023/07/26/1 PATCH http://www.openwall.com/lists/oss-security/2023/07/31/2 PATCH http://xenbits.xen.org/xsa/advisory-433.html ADVISORY https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-7008 REF http://seclists.org/fulldisclosure/2023/Jul/43 REF http://www.openwall.com/lists/oss-security/2023/07/24/3 REF http://www.openwall.com/lists/oss-security/2023/07/25/1 REF http://www.openwall.com/lists/oss-security/2023/07/25/12 REF http://www.openwall.com/lists/oss-security/2023/07/25/13 REF http://www.openwall.com/lists/oss-security/2023/07/25/14 REF http://www.openwall.com/lists/oss-security/2023/07/25/15 REF http://www.openwall.com/lists/oss-security/2023/07/25/16 REF http://www.openwall.com/lists/oss-security/2023/07/25/17 REF http://www.openwall.com/lists/oss-security/2023/07/25/5 REF http://www.openwall.com/lists/oss-security/2023/07/25/6 REF http://www.openwall.com/lists/oss-security/2023/08/08/6 REF http://www.openwall.com/lists/oss-security/2023/08/08/7 REF http://www.openwall.com/lists/oss-security/2023/08/08/8 REF http://www.openwall.com/lists/oss-security/2023/08/16/4 REF http://www.openwall.com/lists/oss-security/2023/08/16/5 REF http://www.openwall.com/lists/oss-security/2023/09/22/11 REF http://www.openwall.com/lists/oss-security/2023/09/22/9 REF http://www.openwall.com/lists/oss-security/2023/09/25/4 REF http://www.openwall.com/lists/oss-security/2023/09/25/7 REF https://lists.debian.org/debian-lts-announce/2023/07/msg00030.html REF https://lists.debian.org/debian-lts-announce/2023/07/msg00033.html REF https://lists.debian.org/debian-lts-announce/2023/08/msg00001.html REF https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CP6WQO3CDPLE5O635N7TAL5KCZ6HZ4FE/ REF https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HKKYIK2EASDNUV4I7EFJKNBVO3KCKGRR/ REF https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SD2G74BXS2SWOE3FIQJ6X76S3A7PDGML/ REF https://security.netapp.com/advisory/ntap-20240531-0004/ REF https://www.debian.org/security/2023/dsa-5459 REF https://www.debian.org/security/2023/dsa-5461 REF https://www.debian.org/security/2023/dsa-5462

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