Vulnerability-Lookup

VDE-2021-025

Vulnerability from csaf_phoenixcontactgmbhcokg - Published: 2021-06-23 12:19 - Updated: 2025-05-14 12:28

Summary

PHOENIX CONTACT: Security Advisory for PLCNext, ILC 2050 BI, FL MGUARD DM UNLIMITED, TC ROUTER und CLOUD CLIENT products

Notes

Summary: A Denial of Service and a CA Check Problem have been identified in multiple openSSL 1.1.1 versions, which are utilized in the Phoenix Contact products listed above.

Impact: Note: ILC 20250 is only affected by CVE-2021-3449

Mitigation: Phoenix Contact recommends operating network-capable devices in closed networks or protected with a suitable firewall. For detailed information on our recommendations for measures to protect network-capable devices, please refer to our application note: Measures to protect network-capable devices with Ethernet connection

Remediation: Phoenix Contact strongly recommends updating to the latest firmware mentioned in the list of affected products, which fixes this vulnerability. A fix for ILC 2050, and some TC ROUTER and CLOUD CLIENT devices will be available end of Q2 2021. This advisory will be updated as soon as the fixes are available for download.

CVE-2021-3450

The X509_V_FLAG_X509_STRICT flag enables additional security checks of the certificates present in a certificate chain. It is not set by default. Starting from OpenSSL version 1.1.1h a check to disallow certificates in the chain that have explicitly encoded elliptic curve parameters was added as an additional strict check. An error in the implementation of this check meant that the result of a previous check to confirm that certificates in the chain are valid CA certificates was overwritten. This effectively bypasses the check that non-CA certificates must not be able to issue other certificates. If a "purpose" has been configured then there is a subsequent opportunity for checks that the certificate is a valid CA. All of the named "purpose" values implemented in libcrypto perform this check. Therefore, where a purpose is set the certificate chain will still be rejected even when the strict flag has been used. A purpose is set by default in libssl client and server certificate verification routines, but it can be overridden or removed by an application. In order to be affected, an application must explicitly set the X509_V_FLAG_X509_STRICT verification flag and either not set a purpose for the certificate verification or, in the case of TLS client or server applications, override the default purpose. OpenSSL versions 1.1.1h and newer are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1k. OpenSSL 1.0.2 is not impacted by this issue. Fixed in OpenSSL 1.1.1k (Affected 1.1.1h-1.1.1j).

7.4 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

CWE-295 - Improper Certificate Validation

Mitigation Phoenix Contact recommends operating network-capable devices in closed networks or protected with a suitable firewall. For detailed information on our recommendations for measures to protect network-capable devices, please refer to our application note: Measures to protect network-capable devices with Ethernet connection.

CVE-2021-3449

An OpenSSL TLS server may crash if sent a maliciously crafted renegotiation ClientHello message from a client. If a TLSv1.2 renegotiation ClientHello omits the signature_algorithms extension (where it was present in the initial ClientHello), but includes a signature_algorithms_cert extension then a NULL pointer dereference will result, leading to a crash and a denial of service attack. A server is only vulnerable if it has TLSv1.2 and renegotiation enabled (which is the default configuration). OpenSSL TLS clients are not impacted by this issue. All OpenSSL 1.1.1 versions are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1k. OpenSSL 1.0.2 is not impacted by this issue. Fixed in OpenSSL 1.1.1k (Affected 1.1.1-1.1.1j).

7.4 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

CWE-476 - NULL Pointer Dereference

References

URL

Category

	https://certvde.com/en/advisories/vendor/phoenixc…	external
	https://certvde.com/en/advisories/VDE-2020-007	self
	https://phoenixcontact.csaf-tp.certvde.com/.well-…	self

Acknowledgments

CERT@VDE certvde.com

JSON

To clipboard

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      {
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      {
        "category": "installed_on",
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        "relates_to_product_reference": "CSAFPID-11008"
      },
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Firmware \u003c=V1.6.0.1 installed on SMARTRTU AXC SG",
          "product_id": "CSAFPID-31009"
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        "relates_to_product_reference": "CSAFPID-11009"
      },
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Firmware \u003c2.06.5 installed on TC ROUTER 2002T-3G",
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        "category": "installed_on",
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        "category": "installed_on",
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        "category": "installed_on",
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      "cwe": {
        "id": "CWE-295",
        "name": "Improper Certificate Validation"
      },
      "notes": [
        {
          "category": "description",
          "text": "The X509_V_FLAG_X509_STRICT flag enables additional security checks of the certificates present in a certificate chain. It is not set by default. Starting from OpenSSL version 1.1.1h a check to disallow certificates in the chain that have explicitly encoded elliptic curve parameters was added as an additional strict check. An error in the implementation of this check meant that the result of a previous check to confirm that certificates in the chain are valid CA certificates was overwritten. This effectively bypasses the check that non-CA certificates must not be able to issue other certificates. If a \"purpose\" has been configured then there is a subsequent opportunity for checks that the certificate is a valid CA. All of the named \"purpose\" values implemented in libcrypto perform this check. Therefore, where a purpose is set the certificate chain will still be rejected even when the strict flag has been used. A purpose is set by default in libssl client and server certificate verification routines, but it can be overridden or removed by an application. In order to be affected, an application must explicitly set the X509_V_FLAG_X509_STRICT verification flag and either not set a purpose for the certificate verification or, in the case of TLS client or server applications, override the default purpose. OpenSSL versions 1.1.1h and newer are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1k. OpenSSL 1.0.2 is not impacted by this issue. Fixed in OpenSSL 1.1.1k (Affected 1.1.1h-1.1.1j).",
          "title": "Vulnerability Description"
        }
      ],
      "product_status": {
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          "CSAFPID-32002",
          "CSAFPID-32003",
          "CSAFPID-32004",
          "CSAFPID-32005",
          "CSAFPID-32006",
          "CSAFPID-32007",
          "CSAFPID-32008",
          "CSAFPID-32009",
          "CSAFPID-32010",
          "CSAFPID-32011",
          "CSAFPID-32012"
        ],
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          "CSAFPID-31002",
          "CSAFPID-31003",
          "CSAFPID-31004",
          "CSAFPID-31005",
          "CSAFPID-31006",
          "CSAFPID-31007",
          "CSAFPID-31008",
          "CSAFPID-31009",
          "CSAFPID-31010",
          "CSAFPID-31011",
          "CSAFPID-31012",
          "CSAFPID-31013",
          "CSAFPID-31014",
          "CSAFPID-31015",
          "CSAFPID-31016",
          "CSAFPID-31017",
          "CSAFPID-31018",
          "CSAFPID-31019",
          "CSAFPID-31020",
          "CSAFPID-31021",
          "CSAFPID-31022"
        ]
      },
      "remediations": [
        {
          "category": "mitigation",
          "details": "Phoenix Contact recommends operating network-capable devices in closed networks or protected with a suitable firewall. For detailed information on our recommendations for measures to protect network-capable devices, please refer to our application note:\nMeasures to protect network-capable devices with Ethernet connection.",
          "group_ids": [
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          ]
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            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.4,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "environmentalScore": 7.4,
            "environmentalSeverity": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "temporalScore": 7.4,
            "temporalSeverity": "HIGH",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
            "version": "3.1"
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          "products": [
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            "CSAFPID-31002",
            "CSAFPID-31003",
            "CSAFPID-31004",
            "CSAFPID-31005",
            "CSAFPID-31006",
            "CSAFPID-31007",
            "CSAFPID-31008",
            "CSAFPID-31009",
            "CSAFPID-31010",
            "CSAFPID-31011",
            "CSAFPID-31012",
            "CSAFPID-31013",
            "CSAFPID-31014",
            "CSAFPID-31015",
            "CSAFPID-31016",
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            "CSAFPID-31019",
            "CSAFPID-31020",
            "CSAFPID-31021",
            "CSAFPID-31022"
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      "title": "CVE-2021-3450"
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      "cwe": {
        "id": "CWE-476",
        "name": "NULL Pointer Dereference"
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          "text": "An OpenSSL TLS server may crash if sent a maliciously crafted renegotiation ClientHello message from a client. If a TLSv1.2 renegotiation ClientHello omits the signature_algorithms extension (where it was present in the initial ClientHello), but includes a signature_algorithms_cert extension then a NULL pointer dereference will result, leading to a crash and a denial of service attack. A server is only vulnerable if it has TLSv1.2 and renegotiation enabled (which is the default configuration). OpenSSL TLS clients are not impacted by this issue. All OpenSSL 1.1.1 versions are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1k. OpenSSL 1.0.2 is not impacted by this issue. Fixed in OpenSSL 1.1.1k (Affected 1.1.1-1.1.1j).",
          "title": "Vulnerability Description"
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          "CSAFPID-31017",
          "CSAFPID-31018",
          "CSAFPID-31019",
          "CSAFPID-31020",
          "CSAFPID-31021",
          "CSAFPID-31022"
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        {
          "category": "mitigation",
          "details": "Phoenix Contact recommends operating network-capable devices in closed networks or protected with a suitable firewall. For detailed information on our recommendations for measures to protect network-capable devices, please refer to our application note:\nMeasures to protect network-capable devices with Ethernet connection.",
          "group_ids": [
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            "confidentialityImpact": "HIGH",
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            "integrityImpact": "HIGH",
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            "scope": "UNCHANGED",
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            "temporalSeverity": "HIGH",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-31001",
            "CSAFPID-31002",
            "CSAFPID-31003",
            "CSAFPID-31004",
            "CSAFPID-31005",
            "CSAFPID-31006",
            "CSAFPID-31007",
            "CSAFPID-31008",
            "CSAFPID-31009",
            "CSAFPID-31010",
            "CSAFPID-31011",
            "CSAFPID-31012",
            "CSAFPID-31013",
            "CSAFPID-31014",
            "CSAFPID-31015",
            "CSAFPID-31016",
            "CSAFPID-31017",
            "CSAFPID-31018",
            "CSAFPID-31019",
            "CSAFPID-31020",
            "CSAFPID-31021",
            "CSAFPID-31022"
          ]
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      ],
      "title": "CVE-2021-3449"
    }
  ]
}

CVE-2021-3450 (GCVE-0-2021-3450)

Vulnerability from cvelistv5 – Published: 2021-03-25 14:25 – Updated: 2024-09-17 03:07

Title

CA certificate check bypass with X509_V_FLAG_X509_STRICT

Summary

Severity ?

No CVSS data available.

CWE

Invalid Certificate Verification

Assigner

openssl

References

URL

Tags

	https://www.openssl.org/news/secadv/20210325.txt	x_refsource_CONFIRM
	https://git.openssl.org/gitweb/?p=openssl.git%3Ba…	x_refsource_CONFIRM
	https://tools.cisco.com/security/center/content/C…	vendor-advisoryx_refsource_CISCO
	http://www.openwall.com/lists/oss-security/2021/03/27/1	mailing-listx_refsource_MLIST
	http://www.openwall.com/lists/oss-security/2021/03/27/2	mailing-listx_refsource_MLIST
	http://www.openwall.com/lists/oss-security/2021/03/28/3	mailing-listx_refsource_MLIST
	http://www.openwall.com/lists/oss-security/2021/03/28/4	mailing-listx_refsource_MLIST
	https://security.gentoo.org/glsa/202103-03	vendor-advisoryx_refsource_GENTOO
	https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
	https://www.oracle.com/security-alerts/cpuApr2021.html	x_refsource_MISC
	https://www.tenable.com/security/tns-2021-09	x_refsource_CONFIRM
	https://security.netapp.com/advisory/ntap-2021032…	x_refsource_CONFIRM
	https://security.FreeBSD.org/advisories/FreeBSD-S…	x_refsource_MISC
	https://www.tenable.com/security/tns-2021-05	x_refsource_CONFIRM
	https://kc.mcafee.com/corporate/index?page=conten…	x_refsource_CONFIRM
	https://www.tenable.com/security/tns-2021-08	x_refsource_CONFIRM
	https://mta.openssl.org/pipermail/openssl-announc…	x_refsource_MISC
	https://www.oracle.com//security-alerts/cpujul2021.html	x_refsource_MISC
	https://kb.pulsesecure.net/articles/Pulse_Securit…	x_refsource_CONFIRM
	https://psirt.global.sonicwall.com/vuln-detail/SN…	x_refsource_CONFIRM
	https://www.oracle.com/security-alerts/cpuoct2021.html	x_refsource_MISC
	https://www.oracle.com/security-alerts/cpuapr2022.html	x_refsource_MISC
	https://cert-portal.siemens.com/productcert/pdf/s…	x_refsource_CONFIRM
	https://www.oracle.com/security-alerts/cpujul2022.html	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	OpenSSL	OpenSSL	Affected: Fixed in OpenSSL 1.1.1k (Affected 1.1.1h-1.1.1j)

Date Public ?

2021-03-25 00:00

Credits

Benjamin Kaduk (Akamai), Xiang Ding (Akamai), others at Akamai

Show details on NVD website

JSON

To clipboard

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CVE-2021-3449 (GCVE-0-2021-3449)

Vulnerability from cvelistv5 – Published: 2021-03-25 14:25 – Updated: 2024-09-17 03:43

Title

NULL pointer deref in signature_algorithms processing

Summary

Severity ?

No CVSS data available.

CWE

NULL pointer dereference

Assigner

openssl

References

URL

	Vendor	Product	Version
	OpenSSL	OpenSSL	Affected: Fixed in OpenSSL 1.1.1k (Affected 1.1.1-1.1.1j)

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

VDE-2021-025

CVE-2021-3450 (GCVE-0-2021-3450)

CVE-2021-3449 (GCVE-0-2021-3449)

Tags

Sightings

Nomenclature