Evidence used
- No CISA KEV confirmation is currently recorded.
- The selected CVSS metric records a network-reachable, unauthenticated path with no user interaction.
- EPSS is 1.85% for the current model date.
BlackTreeCVE IntelligenceFull vulnerability report · 2023
CVE-2023-0217High confidence
NULL dereference validating DSA public key
OpenSSL · OpenSSL
Official source article: Siemens SSA-699386 ↗. Check the applicable product and release in the original source.
7.5HighCVSS 3.1
Patch only the product branches with a verified fix
Fix availability varies by productHigh technical severity; prioritise exposed affected systems while verifying vendor guidance. Verified remediation exists for at least one product or source, but 72 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.
R
Open reassessment dashboard →Operational reassessment
Published severity in operational context
Published severityHigh→Operational priority:High, unchanged from published severity.unchanged
Compensating controls
- Validate the affected product branch and deploy the verified fixed release.
- Restrict the affected network interface to trusted sources where business-safe.
- Monitor vendor guidance and exploitation sources for a material change.
Verification
- Confirm that the asset runs OpenSSL OpenSSL and falls inside the recorded affected range.
- Verify the installed build against the product-specific fixed version after deployment.
- Validate exposure, authentication requirements and compensating controls in the actual environment.
- Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Remediation availability differs by product scope
Verified remediation exists for at least one product or source, but 72 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.
- Siemens ProductCERT: 71 affected or under-investigation product states without a fixed product state in the same current advisory
- Siemens ProductCERT: 1 affected or under-investigation product state without a fixed product state in the same current advisory
Distribution package intelligence
7 package statesRelease-specific package status
Alpine, Debian findings are scoped to the named distribution, release and source package. An absent finding does not mean a package is unaffected.
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.
| Distribution release | Source package | Vendor state | Fixed version | Evidence |
|---|---|---|---|---|
| Alpine v3.23v3.23 · main | openssl | Vendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected. | 3.0.8-r0 | Alpine Security Database ↗Source updated 3 Oct 2026 |
| Alpine v3.22v3.22 · main | openssl | Vendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected. | 3.0.8-r0 | Alpine Security Database ↗Source updated 3 Oct 2026 |
| Alpine v3.21v3.21 · main | openssl | Vendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected. | 3.0.8-r0 | Alpine Security Database ↗Source updated 3 Oct 2026 |
| Debian trixietrixie · source | openssl | Vendor fix publishedDebian records a fixed source-package version for this release. | 3.0.8-1 | Debian Security Tracker ↗Source updated 6 Oct 2026 |
| Debian bookwormbookworm · source | openssl | Vendor fix publishedDebian records a fixed source-package version for this release. | 3.0.8-1 | Debian Security Tracker ↗Source updated 6 Oct 2026 |
| Debian forkyforky · source | openssl | Vendor fix publishedDebian records a fixed source-package version for this release. | 3.0.8-1 | Debian Security Tracker ↗Source updated 6 Oct 2026 |
| Debian sidsid · source | openssl | Vendor fix publishedDebian records a fixed source-package version for this release. | 3.0.8-1 | Debian Security Tracker ↗Source updated 6 Oct 2026 |
Open-source package ranges1 source-attributed range
These OSV and GitHub advisory ranges apply only to the named package and ecosystem. A listed fixed version is not a universal product patch or proof that an update is installed.
| Ecosystem and package | Affected range | First fixed version | Evidence |
|---|---|---|---|
| rustopenssl-src | >= 300.0.0, < 300.0.12 | 300.0.12 | GitHub advisory ↗github reviewed aggregator · 13 Feb 2025 |
Direct vendor intelligence
2 currentAuthoritative 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.
SSA-699386 · CSAF 2.0 · revision 3 · interimSiemens ProductCERTSSA-699386: Multiple Vulnerabilities in SCALANCE XB-200 / XC-200 / XP-200 / XF-200BA / XR-300WG Family before V4.5
The vendor explicitly identifies these products as affected by this CVE.
- SCALANCE XB205-3 (SC, PN) (6GK5205-3BB00-2AB2)
- SCALANCE XB205-3 (ST, E/IP) (6GK5205-3BB00-2TB2)
- SCALANCE XB205-3 (ST, E/IP) (6GK5205-3BD00-2TB2)
- SCALANCE XB205-3 (ST, PN) (6GK5205-3BD00-2AB2)
- SCALANCE XB205-3LD (SC, E/IP) (6GK5205-3BF00-2TB2)
- SCALANCE XB205-3LD (SC, PN) (6GK5205-3BF00-2AB2)
- SCALANCE XB208 (E/IP) (6GK5208-0BA00-2TB2)
- SCALANCE XB208 (PN) (6GK5208-0BA00-2AB2)
- SCALANCE XB213-3 (SC, E/IP) (6GK5213-3BD00-2TB2)
- SCALANCE XB213-3 (SC, PN) (6GK5213-3BD00-2AB2)
- SCALANCE XB213-3 (ST, E/IP) (6GK5213-3BB00-2TB2)
- SCALANCE XB213-3 (ST, PN) (6GK5213-3BB00-2AB2)
- Summary
- An invalid pointer dereference on read can be triggered when an application tries to check a malformed DSA public key by the EVP_PKEY_public_check() function. This will most likely lead to an application crash. This function can be called on public keys supplied from untrusted sources which could allow an attacker to cause a denial of service attack. The TLS implementation in OpenSSL does not call this function but applications might call the function if there are additional security requirements imposed by standards such as FIPS 140-3.
- Remediation
- Update to V4.5 or later version
SSA-943925 · CSAF 2.0 · revision 2 · interimSiemens ProductCERTSSA-943925: Multiple Vulnerabilities in SINEC NMS before V2.0 SP1
The vendor explicitly identifies these products as affected by this CVE.
- SINEC NMS
- Summary
- An invalid pointer dereference on read can be triggered when an application tries to check a malformed DSA public key by the EVP_PKEY_public_check() function. This will most likely lead to an application crash. This function can be called on public keys supplied from untrusted sources which could allow an attacker to cause a denial of service attack. The TLS implementation in OpenSSL does not call this function but applications might call the function if there are additional security requirements imposed by standards such as FIPS 140-3.
- Remediation
- Update to V2.0 SP1 or later version
High technical severity; prioritise exposed affected systems while verifying vendor guidance. Verified remediation exists for at least one product or source, but 72 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.
Fix availability varies by product01
What, why and how
An invalid pointer dereference on read can be triggered when an application tries to check a malformed DSA public key by the EVP_PKEY_public_check() function. This will most likely lead to an application crash. This function can be called on public keys supplied from untrusted sources which could allow an attacker to cause a denial of service attack. The TLS implementation in OpenSSL does not call this function but applications might call the function if there are additional security requirements imposed by standards such as FIPS 140-3.
What
An invalid pointer dereference on read can be triggered when an application tries to check a malformed DSA public key by the EVP_PKEY_public_check() function. This will most likely lead to an application crash. This function can be called on public keys supplied from untrusted sources which could allow an attacker to cause a denial of service attack. The TLS implementation in OpenSSL does not call this function but applications might call the function if there are additional security requirements imposed by standards such as FIPS 140-3.
Why
The product dereferences a pointer that it expects to be valid but is NULL.
How
An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may disrupt the affected service.
What
An invalid pointer dereference on read can be triggered when an application tries to check a malformed DSA public key by the EVP_PKEY_public_check() function. This will most likely lead to an application crash. This function can be called on public keys supplied from untrusted sources which could allow an attacker to cause a denial of service attack. The TLS implementation in OpenSSL does not call this function but applications might call the function if there are additional security requirements imposed by standards such as FIPS 140-3.
Why
The product dereferences a pointer that it expects to be valid but is NULL.
How
An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may disrupt the affected service.
02
Exploit reality and attack path
CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.
Observed exploitation No confirmed evidence
?
Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.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 None recorded
?
Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.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
- a network path → NULL Pointer Dereference → disrupt the affected service
- Attack surface
- Network
- Privileges required
- None: unauthenticated exploitation is possible
- User interaction
- None
- 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-476 ↗
CWE-476: NULL Pointer Dereference. The product dereferences a pointer that it expects to be valid but is NULL.
- CVSS vector
?
CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity. CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCommon Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.
AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.INoneIntegrity impact: No direct loss is represented by this metric.AHighAvailability impact: A successful attack can cause a major loss.- Post-exploitation / living off the land
- No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
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. - Fix availability varies by product
- Affected
- SCALANCE XB205-3 (SC, PN) (6GK5205-3BB00-2AB2)
- SCALANCE XB205-3 (ST, E/IP) (6GK5205-3BB00-2TB2)
- SCALANCE XB205-3 (ST, E/IP) (6GK5205-3BD00-2TB2)
- SCALANCE XB205-3 (ST, PN) (6GK5205-3BD00-2AB2)
- SCALANCE XB205-3LD (SC, E/IP) (6GK5205-3BF00-2TB2)
- SCALANCE XB205-3LD (SC, PN) (6GK5205-3BF00-2AB2)
- SCALANCE XB208 (E/IP) (6GK5208-0BA00-2TB2)
- SCALANCE XB208 (PN) (6GK5208-0BA00-2AB2)
- SCALANCE XB213-3 (SC, E/IP) (6GK5213-3BD00-2TB2)
- SCALANCE XB213-3 (SC, PN) (6GK5213-3BD00-2AB2)
- SCALANCE XB213-3 (ST, E/IP) (6GK5213-3BB00-2TB2)
- SCALANCE XB213-3 (ST, PN) (6GK5213-3BB00-2AB2)
- SCALANCE XB213-3LD (SC, E/IP) (6GK5213-3BF00-2TB2)
- SCALANCE XB213-3LD (SC, PN) (6GK5213-3BF00-2AB2)
- SCALANCE XB216 (E/IP) (6GK5216-0BA00-2TB2)
- SCALANCE XB216 (PN) (6GK5216-0BA00-2AB2)
- SCALANCE XC206-2 (SC) (6GK5206-2BD00-2AC2)
- SCALANCE XC206-2 (ST/BFOC) (6GK5206-2BB00-2AC2)
- SCALANCE XC206-2G PoE (6GK5206-2RS00-2AC2)
- SCALANCE XC206-2G PoE (54 V DC) (6GK5206-2RS00-5AC2)
- SCALANCE XC206-2G PoE EEC (54 V DC) (6GK5206-2RS00-5FC2)
- SCALANCE XC206-2SFP (6GK5206-2BS00-2AC2)
- SCALANCE XC206-2SFP EEC (6GK5206-2BS00-2FC2)
- SCALANCE XC206-2SFP G (6GK5206-2GS00-2AC2)
- SCALANCE XC206-2SFP G (EIP DEF.) (6GK5206-2GS00-2TC2)
- SCALANCE XC206-2SFP G EEC (6GK5206-2GS00-2FC2)
- SCALANCE XC208 (6GK5208-0BA00-2AC2)
- SCALANCE XC208EEC (6GK5208-0BA00-2FC2)
- SCALANCE XC208G (6GK5208-0GA00-2AC2)
- SCALANCE XC208G (EIP def.) (6GK5208-0GA00-2TC2)
- and 41 more
- Action
- Use the product-specific evidence above. Patch only products with a verified fixed release, and keep every affected or under-investigation state without a matching fix in the remediation queue.
- Workaround
- No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04
Evidence and provenance
Published 8 Feb 2023 · Last source change 4 Nov 2025, 19:14 UTC · CWE-476 · NULL Pointer Dereference
CVE recordCVE.org · 5.2
CVSS sourceNIST NVD
EPSS source FIRST · tracked since 2026-08-14
?
The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.European sourceENISA EUVD · EUVD-2023-0806
Product sourceVendor CSAF · Siemens ProductCERT
Remediation sourceVendor CSAF · Siemens ProductCERT
CWE sourceCISA ADP
NVD statusNVD modified after enrichment
Core structured fields are present and their contributing authorities are shown above.
Material change intelligence
View recent updates ↗What changed after publication
- Remediation statusRemediation status changed from Awaiting fix to Mitigation available.Siemens ProductCERT ↗
- Before
- Awaiting fix
- After
- Mitigation available
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.