BlackTreeIndependent security intelligence

Full vulnerability report · 2023

CVE-2022-24834High confidence

Heap overflow issue with the Lua cjson library used by Redis

redis · redis

7.0HighCVSS 3.1

Recommended action

Within 7 days

High technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Patch available

Distribution package intelligence

Ubuntu vendor package status

Canonical’s release and source-package findings are shown separately from local repository availability.

1 package state

Repository candidate not checked

A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.

Ubuntu release	Source package	Vendor state	Fixed version	Evidence
Ubuntu 24.04 LTSnoble · standard archive	`lua-cjson`	Under evaluationCanonical reports that the package might be affected and still needs evaluation or fixing.	`Not published in this feed`	Canonical record ↗Source updated 9 Sept 2026

Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

1 current

SSA-806742 · CSAF 2.0 · revision 1 · interimSiemens ProductCERTSSA-806742: Multiple Vulnerabilities in SCALANCE XCM-/XRM-300 before V2.4

11 known affected

The vendor explicitly identifies these products as affected by this CVE.

SCALANCE XCH328 (6GK5328-4TS01-2EC2)
SCALANCE XCM324 (6GK5324-8TS01-2AC2)
SCALANCE XCM328 (6GK5328-4TS01-2AC2)
SCALANCE XCM332 (6GK5332-0GA01-2AC2)
SCALANCE XRH334 (24 V DC, 8xFO, CC) (6GK5334-2TS01-2ER3)
SCALANCE XRM334 (230 V AC, 12xFO) (6GK5334-3TS01-3AR3)
SCALANCE XRM334 (230 V AC, 8xFO) (6GK5334-2TS01-3AR3)
SCALANCE XRM334 (24 V DC, 12xFO) (6GK5334-3TS01-2AR3)
SCALANCE XRM334 (24 V DC, 8xFO) (6GK5334-2TS01-2AR3)
SCALANCE XRM334 (2x230 V AC, 12xFO) (6GK5334-3TS01-4AR3)
SCALANCE XRM334 (2x230 V AC, 8xFO) (6GK5334-2TS01-4AR3)

Summary: Redis is an in-memory database that persists on disk. A specially crafted Lua script executing in Redis can trigger a heap overflow in the cjson library, and result with heap corruption and potentially remote code execution. The problem exists in all versions of Redis with Lua scripting support, starting from 2.6, and affects only authenticated and authorized users. The problem is fixed in versions 7.0.12, 6.2.13, and 6.0.20.
Remediation: Update to V2.4 or later version

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-2022-29620

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 actionWithin 7 days

High technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Patch available

What, why and how

Redis is an in-memory database that persists on disk. A specially crafted Lua script executing in Redis can trigger a heap overflow in the cjson library, and result with heap corruption and potentially remote code execution. The problem exists in all versions of Redis with Lua scripting support, starting from 2.6, and affects only authenticated and authorized users. The problem is fixed in versions 7.0.12, 6.2.13, and 6.0.20.

What

Why

A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may execute code or commands in the affected security context.

What

Why

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may execute code or commands in the affected security context.

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.

Reference recorded

CISA Vulnrichment records proof-of-concept exploitation in its SSVC data. BlackTree has not independently executed or validated exploit material.

Likely attack path: local access → Heap-based Buffer Overflow → execute code or commands in the affected security context
Attack surface: Local
Privileges required: Low: a basic authenticated account is required
User interaction: None
Attack complexity: High: exploitation depends on specific conditions
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-122 ↗
CWE-122: Heap-based Buffer Overflow. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
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:H/PR:L/UI:N/S:U/C:H/I:H/A:H
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.ACHighAttack complexity: Successful exploitation depends on specific conditions outside the attacker's direct control.PRLowPrivileges required: The attacker needs basic user-level privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land: After compromise, an attacker may use built-in shells, scripting engines, scheduled tasks and native network utilities for discovery, persistence or movement. This is a plausible LoTL path, not evidence that it has occurred for every attack.

Remote code executionCWE-122Public exploit reference

Official authority intelligence

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

ENISA EUVD · EUVD-2022-29620Official EUVD mapping

0 linked advisory records.

Official EUVD record

BSI · German · WID-SEC-W-2023-2679Oracle Communications: Mehrere Schwachstellen

Ein entfernter, anonymer oder authentisierter Angreifer kann mehrere Schwachstellen in Oracle Communications ausnutzen, um die Vertraulichkeit, Integrität und Verfügbarkeit zu gefährden.

Official advisory

BSI · German · WID-SEC-W-2023-1698Redis: Mehrere Schwachstellen ermöglichen Codeausführung

Ein lokaler Angreifer kann mehrere Schwachstellen in Redis ausnutzen, um beliebigen Programmcode auszuführen.

Official advisory

CERT-FR · French · CERTFR-2024-AVI-0923Multiples vulnérabilités dans les produits IBM

ERecord?id=CVE-2021-34428 Référence CVE CVE-2021-3803 https://www.cve.org/CVERecord?id=CVE-2021-3803 Référence CVE CVE-2021-40690 https://www.cve.org/CVERecord?id=CVE-2021-40690 Référence CVE CVE-2021-43138 https://www.cve.org/CVERecord?id=CVE-2021-43138 Référence CVE CVE-2021-44906 https://www.cve.org/CVERecord?id=CVE-2021-44906 Référence CVE CVE-2022-0144 https://www.cve.org/CVERecord?id=CVE-2022-0144 Référence CVE CVE-2022-0235 https://www.cve.org/CVERecord?id=CVE-2022-0235 Référence CVE CVE-2022-24735 https://www.cve.org/CVERecord?id=CVE-2022-24735 Référence CVE CVE-2022-24736 https://www.cve.org/CVERecord?id=CVE-2022-24736 Référence CVE CVE-2022-24834 https://www.cve.org/CVERecord?id=CVE-2022-24834 Référence CVE CVE-2022-25883 https://www.cve.org/CVERecord?id=CVE-2022-25883 Référence CVE CVE-2022-29622 https://www.cve.org/CVERecord?id=CVE-2022-29622 Référence CVE CVE-2022-3517 https://www.cve.org/CVERecord?id=CVE-2022-3517 Référence CVE CVE-2022-36943 https://www.cve.org/CVERecord?id=CVE-2022-36943 Référence CVE CVE-2022-38900 https://www.cve.org/CVERecord?id=CVE-2022-38900 Référence CVE CVE-2022-43383 https://www.cve.org/CVERecord?id=CVE-2022-43383 Référence CVE CVE-2022-46175 https://www.cve.org/CVERecord?id=CVE-2022-46175 Référence CVE CVE-2023-0842 https://www.cve.org/CVERecord?id=CVE

Official advisory

CERT-FR · French · CERTFR-2024-AVI-0119Multiples vulnérabilités dans les produits Siemens

/CVERecord?id=CVE-2021-3638 Référence CVE CVE-2021-4037 https://www.cve.org/CVERecord?id=CVE-2021-4037 Référence CVE CVE-2021-43666 https://www.cve.org/CVERecord?id=CVE-2021-43666 Référence CVE CVE-2021-45451 https://www.cve.org/CVERecord?id=CVE-2021-45451 Référence CVE CVE-2022-0778 https://www.cve.org/CVERecord?id=CVE-2022-0778 Référence CVE CVE-2022-1015 https://www.cve.org/CVERecord?id=CVE-2022-1015 Référence CVE CVE-2022-1348 https://www.cve.org/CVERecord?id=CVE-2022-1348 Référence CVE CVE-2022-23471 https://www.cve.org/CVERecord?id=CVE-2022-23471 Référence CVE CVE-2022-23521 https://www.cve.org/CVERecord?id=CVE-2022-23521 Référence CVE CVE-2022-24834 https://www.cve.org/CVERecord?id=CVE-2022-24834 Référence CVE CVE-2022-2586 https://www.cve.org/CVERecord?id=CVE-2022-2586 Référence CVE CVE-2022-26691 https://www.cve.org/CVERecord?id=CVE-2022-26691 Référence CVE CVE-2022-28737 https://www.cve.org/CVERecord?id=CVE-2022-28737 Référence CVE CVE-2022-28738 https://www.cve.org/CVERecord?id=CVE-2022-28738 Référence CVE CVE-2022-28739 https://www.cve.org/CVERecord?id=CVE-2022-28739 Référence CVE CVE-2022-2880 https://www.cve.org/CVERecord?id=CVE-2022-2880 Référence CVE CVE-2022-29154 https://www.cve.org/CVERecord?id=CVE-2022-29154 Référence CVE CVE-2022-29162 https://www.cve.org/CVERecord?id=CVE-

Official advisory

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: SCALANCE XCH328 (6GK5328-4TS01-2EC2); SCALANCE XCM324 (6GK5324-8TS01-2AC2); SCALANCE XCM328 (6GK5328-4TS01-2AC2); SCALANCE XCM332 (6GK5332-0GA01-2AC2); SCALANCE XRH334 (24 V DC, 8xFO, CC) (6GK5334-2TS01-2ER3); SCALANCE XRM334 (230 V AC, 12xFO) (6GK5334-3TS01-3AR3); SCALANCE XRM334 (230 V AC, 8xFO) (6GK5334-2TS01-3AR3); SCALANCE XRM334 (24 V DC, 12xFO) (6GK5334-3TS01-2AR3); SCALANCE XRM334 (24 V DC, 8xFO) (6GK5334-2TS01-2AR3); SCALANCE XRM334 (2x230 V AC, 12xFO) (6GK5334-3TS01-4AR3); SCALANCE XRM334 (2x230 V AC, 8xFO) (6GK5334-2TS01-4AR3)
Fixed: No fixed version is explicitly recorded in the structured CVE data.
Action: Update to V2.4 or later version
Workaround: No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.

Evidence and provenance

Published 13 Jul 2023 · Last source change 13 Feb 2025, 16:32 UTC · CWE-122 · Heap-based Buffer Overflow

CVE recordCVE.org · 5.1

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-2022-29620

Product sourceVendor CSAF · Siemens ProductCERT

Remediation sourceVendor CSAF · Siemens ProductCERT

CWE sourceCNA

NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

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.

2023-07-13CVE published

ENISA EUVD · EUVD-2022-29620↗Vendor CSAF · Siemens ProductCERT↗CISA Vulnrichment SSVC evidence↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗

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.

Heap overflow issue with the Lua cjson library used by Redis

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

EUVD-2022-29620

What, why and how

Exploit reality and attack path

Official authority intelligence

Patch and workaround

Evidence and provenance

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