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Full vulnerability report · 2024
CVE-2023-6004High confidence

Libssh: proxycommand/proxyjump features allow injection of malicious code through hostname

Red Hat · Red Hat Enterprise Linux 8

4.8MediumCVSS 3.1
Recommended action
Scheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2023-58271

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionScheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
01

What, why and how

A flaw was found in libssh. By utilizing the ProxyCommand or ProxyJump feature, users can exploit unchecked hostname syntax on the client. This issue may allow an attacker to inject malicious code into the command of the features mentioned through the hostname parameter.

What

A flaw was found in libssh. By utilizing the ProxyCommand or ProxyJump feature, users can exploit unchecked hostname syntax on the client. This issue may allow an attacker to inject malicious code into the command of the features mentioned through the hostname parameter.

Why

The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

A flaw was found in libssh. By utilizing the ProxyCommand or ProxyJump feature, users can exploit unchecked hostname syntax on the client. This issue may allow an attacker to inject malicious code into the command of the features mentioned through the hostname parameter.

Why

The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
local access → Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Local
Privileges required
Low: a basic authenticated account is required
User interaction
Required interaction required
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-74

CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection'). The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVLocalAttack vector: The attacker needs local access to the vulnerable system.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRLowPrivileges required: The attacker needs basic user-level privileges.UIRequiredUser interaction: Another user must perform an action for exploitation to succeed.SUnchangedScope: The security impact remains within the vulnerable component's authority.CLowConfidentiality impact: A successful attack can cause a limited loss.ILowIntegrity impact: A successful attack can cause a limited loss.ALowAvailability impact: A successful attack can cause a limited loss.
Post-exploitation / living off the land
The issue can support a local privilege or sandbox boundary transition; normal system utilities may then be available in the gained context.
CWE-74
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

BSI · German · WID-SEC-W-2024-1307Red Hat OpenShift Service Mesh Containers: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Red Hat OpenShift Service Mesh Containers ausnutzen, um Dateien zu manipulieren, einen 'Denial of Service'-Zustand erzuegen, beliebigen Code auszuführen, vertrauliche Informationen offenzulegen oder weitere nicht spezifizierte Angriffe durchzuführen.

Official advisory
BSI · German · WID-SEC-W-2024-3377Dell PowerProtect Data Domain: Mehrere Schwachstellen

Ein lokaler Angreifer kann mehrere Schwachstellen in Dell PowerProtect Data Domain ausnutzen, um seine Privilegien zu erhöhen, Informationen offenzulegen und um nicht näher beschriebene Auswirkungen zu erzielen.

Official advisory
BSI · German · WID-SEC-W-2023-3175libssh: Mehrere Schwachstellen

Ein lokaler Angreifer kann mehrere Schwachstellen in libssh ausnutzen, um beliebigen Programmcode auszuführen oder einen Denial of Service zu verursachen

Official advisory
CERT-FR · French · CERTFR-2025-AVI-0969Multiples vulnérabilités dans les produits VMware

cve.org/CVERecord?id=CVE-2023-52970 Référence CVE CVE-2023-5341 https://www.cve.org/CVERecord?id=CVE-2023-5341 Référence CVE CVE-2023-5363 https://www.cve.org/CVERecord?id=CVE-2023-5363 Référence CVE CVE-2023-5388 https://www.cve.org/CVERecord?id=CVE-2023-5388 Référence CVE CVE-2023-5441 https://www.cve.org/CVERecord?id=CVE-2023-5441 Référence CVE CVE-2023-5568 https://www.cve.org/CVERecord?id=CVE-2023-5568 Référence CVE CVE-2023-5678 https://www.cve.org/CVERecord?id=CVE-2023-5678 Référence CVE CVE-2023-5752 https://www.cve.org/CVERecord?id=CVE-2023-5752 Référence CVE CVE-2023-5981 https://www.cve.org/CVERecord?id=CVE-2023-5981 Référence CVE CVE-2023-6004 https://www.cve.org/CVERecord?id=CVE-2023-6004 Référence CVE CVE-2023-6129 https://www.cve.org/CVERecord?id=CVE-2023-6129 Référence CVE CVE-2023-6228 https://www.cve.org/CVERecord?id=CVE-2023-6228 Référence CVE CVE-2023-6237 https://www.cve.org/CVERecord?id=CVE-2023-6237 Référence CVE CVE-2023-6246 https://www.cve.org/CVERecord?id=CVE-2023-6246 Référence CVE CVE-2023-6277 https://www.cve.org/CVERecord?id=CVE-2023-6277 Référence CVE CVE-2023-6349 https://www.cve.org/CVERecord?id=CVE-2023-6349 Référence CVE CVE-2023-6378 https://www.cve.org/CVERecord?id=CVE-2023-6378 Référence CVE CVE-2023-6481 https://www.cve.org/CVERecord?id=CVE-2023-6481 Ré

Official advisory
CERT-FR · French · CERTFR-2025-AVI-0864Multiples vulnérabilités dans VMware Tanzu

e.org/CVERecord?id=CVE-2023-47038 Référence CVE CVE-2023-4806 https://www.cve.org/CVERecord?id=CVE-2023-4806 Référence CVE CVE-2023-4807 https://www.cve.org/CVERecord?id=CVE-2023-4807 Référence CVE CVE-2023-4813 https://www.cve.org/CVERecord?id=CVE-2023-4813 Référence CVE CVE-2023-48795 https://www.cve.org/CVERecord?id=CVE-2023-48795 Référence CVE CVE-2023-5156 https://www.cve.org/CVERecord?id=CVE-2023-5156 Référence CVE CVE-2023-5363 https://www.cve.org/CVERecord?id=CVE-2023-5363 Référence CVE CVE-2023-5678 https://www.cve.org/CVERecord?id=CVE-2023-5678 Référence CVE CVE-2023-5981 https://www.cve.org/CVERecord?id=CVE-2023-5981 Référence CVE CVE-2023-6004 https://www.cve.org/CVERecord?id=CVE-2023-6004 Référence CVE CVE-2023-6129 https://www.cve.org/CVERecord?id=CVE-2023-6129 Référence CVE CVE-2023-6237 https://www.cve.org/CVERecord?id=CVE-2023-6237 Référence CVE CVE-2023-6597 https://www.cve.org/CVERecord?id=CVE-2023-6597 Référence CVE CVE-2023-6918 https://www.cve.org/CVERecord?id=CVE-2023-6918 Référence CVE CVE-2023-7008 https://www.cve.org/CVERecord?id=CVE-2023-7008 Référence CVE CVE-2023-7104 https://www.cve.org/CVERecord?id=CVE-2023-7104 Référence CVE CVE-2024-0450 https://www.cve.org/CVERecord?id=CVE-2024-0450 Référence CVE CVE-2024-0553 https://www.cve.org/CVERecord?id=CVE-2024-0553 Ré

Official advisory
CERT-FR · French · CERTFR-2025-AVI-0855Multiples vulnérabilités dans les produits Juniper Networks

d?id=CVE-2023-50229 Référence CVE CVE-2023-50230 https://www.cve.org/CVERecord?id=CVE-2023-50230 Référence CVE CVE-2023-51580 https://www.cve.org/CVERecord?id=CVE-2023-51580 Référence CVE CVE-2023-51589 https://www.cve.org/CVERecord?id=CVE-2023-51589 Référence CVE CVE-2023-51592 https://www.cve.org/CVERecord?id=CVE-2023-51592 Référence CVE CVE-2023-51594 https://www.cve.org/CVERecord?id=CVE-2023-51594 Référence CVE CVE-2023-51596 https://www.cve.org/CVERecord?id=CVE-2023-51596 Référence CVE CVE-2023-51764 https://www.cve.org/CVERecord?id=CVE-2023-51764 Référence CVE CVE-2023-52864 https://www.cve.org/CVERecord?id=CVE-2023-52864 Référence CVE CVE-2023-6004 https://www.cve.org/CVERecord?id=CVE-2023-6004 Référence CVE CVE-2023-7104 https://www.cve.org/CVERecord?id=CVE-2023-7104 Référence CVE CVE-2024-12797 https://www.cve.org/CVERecord?id=CVE-2024-12797 Référence CVE CVE-2024-1737 https://www.cve.org/CVERecord?id=CVE-2024-1737 Référence CVE CVE-2024-1975 https://www.cve.org/CVERecord?id=CVE-2024-1975 Référence CVE CVE-2024-21208 https://www.cve.org/CVERecord?id=CVE-2024-21208 Référence CVE CVE-2024-21210 https://www.cve.org/CVERecord?id=CVE-2024-21210 Référence CVE CVE-2024-21217 https://www.cve.org/CVERecord?id=CVE-2024-21217 Référence CVE CVE-2024-21235 https://www.cve.org/CVERecord?id=CVE-202

Official advisory
CERT-FR · French · CERTFR-2024-AVI-0958Multiples vulnérabilités dans les produits IBM

ERecord?id=CVE-2023-52817 Référence CVE CVE-2023-52832 https://www.cve.org/CVERecord?id=CVE-2023-52832 Référence CVE CVE-2023-52834 https://www.cve.org/CVERecord?id=CVE-2023-52834 Référence CVE CVE-2023-52845 https://www.cve.org/CVERecord?id=CVE-2023-52845 Référence CVE CVE-2023-52847 https://www.cve.org/CVERecord?id=CVE-2023-52847 Référence CVE CVE-2023-52864 https://www.cve.org/CVERecord?id=CVE-2023-52864 Référence CVE CVE-2023-5678 https://www.cve.org/CVERecord?id=CVE-2023-5678 Référence CVE CVE-2023-5752 https://www.cve.org/CVERecord?id=CVE-2023-5752 Référence CVE CVE-2023-5764 https://www.cve.org/CVERecord?id=CVE-2023-5764 Référence CVE CVE-2023-6004 https://www.cve.org/CVERecord?id=CVE-2023-6004 Référence CVE CVE-2023-6129 https://www.cve.org/CVERecord?id=CVE-2023-6129 Référence CVE CVE-2023-6597 https://www.cve.org/CVERecord?id=CVE-2023-6597 Référence CVE CVE-2023-6918 https://www.cve.org/CVERecord?id=CVE-2023-6918 Référence CVE CVE-2023-7008 https://www.cve.org/CVERecord?id=CVE-2023-7008 Référence CVE CVE-2023-7104 https://www.cve.org/CVERecord?id=CVE-2023-7104 Référence CVE CVE-2024-0450 https://www.cve.org/CVERecord?id=CVE-2024-0450 Référence CVE CVE-2024-0553 https://www.cve.org/CVERecord?id=CVE-2024-0553 Référence CVE CVE-2024-0727 https://www.cve.org/CVERecord?id=CVE-2024-0727 Ré

Official advisory
CERT-FR · French · CERTFR-2024-AVI-0741Multiples vulnérabilités dans Juniper Secure Analytics

d?id=CVE-2023-52686 Référence CVE CVE-2023-52700 https://www.cve.org/CVERecord?id=CVE-2023-52700 Référence CVE CVE-2023-52703 https://www.cve.org/CVERecord?id=CVE-2023-52703 Référence CVE CVE-2023-52781 https://www.cve.org/CVERecord?id=CVE-2023-52781 Référence CVE CVE-2023-52813 https://www.cve.org/CVERecord?id=CVE-2023-52813 Référence CVE CVE-2023-52835 https://www.cve.org/CVERecord?id=CVE-2023-52835 Référence CVE CVE-2023-52877 https://www.cve.org/CVERecord?id=CVE-2023-52877 Référence CVE CVE-2023-52878 https://www.cve.org/CVERecord?id=CVE-2023-52878 Référence CVE CVE-2023-52881 https://www.cve.org/CVERecord?id=CVE-2023-52881 Référence CVE CVE-2023-6004 https://www.cve.org/CVERecord?id=CVE-2023-6004 Référence CVE CVE-2023-6240 https://www.cve.org/CVERecord?id=CVE-2023-6240 Référence CVE CVE-2023-6597 https://www.cve.org/CVERecord?id=CVE-2023-6597 Référence CVE CVE-2023-6918 https://www.cve.org/CVERecord?id=CVE-2023-6918 Référence CVE CVE-2023-7008 https://www.cve.org/CVERecord?id=CVE-2023-7008 Référence CVE CVE-2024-0340 https://www.cve.org/CVERecord?id=CVE-2024-0340 Référence CVE CVE-2024-0450 https://www.cve.org/CVERecord?id=CVE-2024-0450 Référence CVE CVE-2024-1048 https://www.cve.org/CVERecord?id=CVE-2024-1048 Référence CVE CVE-2024-1737 https://www.cve.org/CVERecord?id=CVE-2024-1737 Ré

Official advisory
CERT-FR · French · CERTFR-2024-AVI-0585Multiples vulnérabilités dans les produits VMware

CVERecord?id=CVE-2023-48795 Référence CVE CVE-2023-50495 https://www.cve.org/CVERecord?id=CVE-2023-50495 Référence CVE CVE-2023-51384 https://www.cve.org/CVERecord?id=CVE-2023-51384 Référence CVE CVE-2023-51385 https://www.cve.org/CVERecord?id=CVE-2023-51385 Référence CVE CVE-2023-5156 https://www.cve.org/CVERecord?id=CVE-2023-5156 Référence CVE CVE-2023-52425 https://www.cve.org/CVERecord?id=CVE-2023-52425 Référence CVE CVE-2023-5341 https://www.cve.org/CVERecord?id=CVE-2023-5341 Référence CVE CVE-2023-5678 https://www.cve.org/CVERecord?id=CVE-2023-5678 Référence CVE CVE-2023-5981 https://www.cve.org/CVERecord?id=CVE-2023-5981 Référence CVE CVE-2023-6004 https://www.cve.org/CVERecord?id=CVE-2023-6004 Référence CVE CVE-2023-6129 https://www.cve.org/CVERecord?id=CVE-2023-6129 Référence CVE CVE-2023-6237 https://www.cve.org/CVERecord?id=CVE-2023-6237 Référence CVE CVE-2023-6918 https://www.cve.org/CVERecord?id=CVE-2023-6918 Référence CVE CVE-2023-7104 https://www.cve.org/CVERecord?id=CVE-2023-7104 Référence CVE CVE-2024-0553 https://www.cve.org/CVERecord?id=CVE-2024-0553 Référence CVE CVE-2024-0567 https://www.cve.org/CVERecord?id=CVE-2024-0567 Référence CVE CVE-2024-0727 https://www.cve.org/CVERecord?id=CVE-2024-0727 Référence CVE CVE-2024-22195 https://www.cve.org/CVERecord?id=CVE-2024-22195

Official advisory
CERT-FR · French · CERTFR-2024-AVI-0579Multiples vulnérabilités dans les produits IBM

ord?id=CVE-2023-43804 Référence CVE CVE-2023-44483 https://www.cve.org/CVERecord?id=CVE-2023-44483 Référence CVE CVE-2023-44487 https://www.cve.org/CVERecord?id=CVE-2023-44487 Référence CVE CVE-2023-45802 https://www.cve.org/CVERecord?id=CVE-2023-45802 Référence CVE CVE-2023-45803 https://www.cve.org/CVERecord?id=CVE-2023-45803 Référence CVE CVE-2023-46158 https://www.cve.org/CVERecord?id=CVE-2023-46158 Référence CVE CVE-2023-50312 https://www.cve.org/CVERecord?id=CVE-2023-50312 Référence CVE CVE-2023-51775 https://www.cve.org/CVERecord?id=CVE-2023-51775 Référence CVE CVE-2023-5752 https://www.cve.org/CVERecord?id=CVE-2023-5752 Référence CVE CVE-2023-6004 https://www.cve.org/CVERecord?id=CVE-2023-6004 Référence CVE CVE-2023-6597 https://www.cve.org/CVERecord?id=CVE-2023-6597 Référence CVE CVE-2023-6918 https://www.cve.org/CVERecord?id=CVE-2023-6918 Référence CVE CVE-2024-0450 https://www.cve.org/CVERecord?id=CVE-2024-0450 Référence CVE CVE-2024-1135 https://www.cve.org/CVERecord?id=CVE-2024-1135 Référence CVE CVE-2024-1597 https://www.cve.org/CVERecord?id=CVE-2024-1597 Référence CVE CVE-2024-2004 https://www.cve.org/CVERecord?id=CVE-2024-2004 Référence CVE CVE-2024-22329 https://www.cve.org/CVERecord?id=CVE-2024-22329 Référence CVE CVE-2024-22353 https://www.cve.org/CVERecord?id=CVE-2024-2235

Official advisory
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
See the vendor and CVE records for the affected range.
Fixed
0:0.9.6-14.el8 < *; 0:0.10.4-13.el9 < *
Action
Review the linked authoritative reference and apply the recorded fixed release appropriate to the affected product branch.
Workaround
No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04

Evidence and provenance

Published 3 Jan 2024 · Last source change 7 Nov 2025, 00:19 UTC · CWE-74 · Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2023-58271
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceCNA
NVD statusNVD modified after enrichment

Missing structured fields: affected versions. Missing data is not evidence of low risk; review the primary advisory.

Material change intelligence

What changed after publication

View recent updates →

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2023-6004 · cve.blacktree.nl