CVE-2021-23839

OpenSSL 1.0.2 supports SSLv2. If a client attempts to negotiate SSLv2 with a server that is configured to support both SSLv2 and more recent SSL and TLS versions then a check is made for a version rollback attack when unpadding an RSA signature. Clients that support SSL or TLS versions greater than SSLv2 are supposed to use a special form of padding. A server that supports greater than SSLv2 is supposed to reject connection attempts from a client where this special form of padding is present, because this indicates that a version rollback has occurred (i.e. both client and server support greater than SSLv2, and yet this is the version that is being requested). The implementation of this padding check inverted the logic so that the connection attempt is accepted if the padding is present, and rejected if it is absent. This means that such as server will accept a connection if a version rollback attack has occurred. Further the server will erroneously reject a connection if a normal SSLv2 connection attempt is made. Only OpenSSL 1.0.2 servers from version 1.0.2s to 1.0.2x are affected by this issue. In order to be vulnerable a 1.0.2 server must: 1) have configured SSLv2 support at compile time (this is off by default), 2) have configured SSLv2 support at runtime (this is off by default), 3) have configured SSLv2 ciphersuites (these are not in the default ciphersuite list) OpenSSL 1.1.1 does not have SSLv2 support and therefore is not vulnerable to this issue. The underlying error is in the implementation of the RSA_padding_check_SSLv23() function. This also affects the RSA_SSLV23_PADDING padding mode used by various other functions. Although 1.1.1 does not support SSLv2 the RSA_padding_check_SSLv23() function still exists, as does the RSA_SSLV23_PADDING padding mode. Applications that directly call that function or use that padding mode will encounter this issue. However since there is no support for the SSLv2 protocol in 1.1.1 this is considered a bug and not a security issue in that version. OpenSSL 1.0.2 is out of support and no longer receiving public updates. Premium support customers of OpenSSL 1.0.2 should upgrade to 1.0.2y. Other users should upgrade to 1.1.1j. Fixed in OpenSSL 1.0.2y (Affected 1.0.2s-1.0.2x).
Configurations

Configuration 1 (hide)

cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*

Configuration 2 (hide)

OR cpe:2.3:a:oracle:business_intelligence:5.5.0.0.0:*:*:*:enterprise:*:*:*
cpe:2.3:a:oracle:business_intelligence:5.9.0.0.0:*:*:*:enterprise:*:*:*
cpe:2.3:a:oracle:business_intelligence:12.2.1.3.0:*:*:*:enterprise:*:*:*
cpe:2.3:a:oracle:business_intelligence:12.2.1.4.0:*:*:*:enterprise:*:*:*
cpe:2.3:a:oracle:enterprise_manager_for_storage_management:13.4.0.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:enterprise_manager_ops_center:12.4.0.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:graalvm:19.3.5:*:*:*:enterprise:*:*:*
cpe:2.3:a:oracle:graalvm:20.3.1.2:*:*:*:community:*:*:*
cpe:2.3:a:oracle:graalvm:21.0.0.2:*:*:*:community:*:*:*
cpe:2.3:a:oracle:jd_edwards_world_security:a9.4:*:*:*:*:*:*:*
cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:*

Configuration 3 (hide)

OR cpe:2.3:a:siemens:sinec_ins:*:*:*:*:*:*:*:*
cpe:2.3:a:siemens:sinec_ins:1.0:-:*:*:*:*:*:*
cpe:2.3:a:siemens:sinec_ins:1.0:sp1:*:*:*:*:*:*

History

07 Nov 2023, 03:30

Type Values Removed Values Added
References
  • {'url': 'https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=30919ab80a478f2d81f2e9acdcca3fa4740cd547', 'name': 'https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=30919ab80a478f2d81f2e9acdcca3fa4740cd547', 'tags': ['Broken Link'], 'refsource': 'CONFIRM'}
  • () https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=30919ab80a478f2d81f2e9acdcca3fa4740cd547 -

08 Aug 2023, 14:22

Type Values Removed Values Added
CWE CWE-326 CWE-327

29 Oct 2022, 02:48

Type Values Removed Values Added
CPE cpe:2.3:a:siemens:sinec_ins:*:*:*:*:*:*:*:*
cpe:2.3:a:siemens:sinec_ins:1.0:-:*:*:*:*:*:*
cpe:2.3:a:siemens:sinec_ins:1.0:sp1:*:*:*:*:*:*
First Time Siemens
Siemens sinec Ins
References (CONFIRM) https://cert-portal.siemens.com/productcert/pdf/ssa-637483.pdf - (CONFIRM) https://cert-portal.siemens.com/productcert/pdf/ssa-637483.pdf - Patch, Third Party Advisory

13 Sep 2022, 12:15

Type Values Removed Values Added
References
  • (CONFIRM) https://cert-portal.siemens.com/productcert/pdf/ssa-637483.pdf -

12 Sep 2022, 13:54

Type Values Removed Values Added
First Time Oracle enterprise Manager For Storage Management
CPE cpe:2.3:a:oracle:manager_for_storage_management:13.4.0.0:*:*:*:*:*:*:* cpe:2.3:a:oracle:enterprise_manager_for_storage_management:13.4.0.0:*:*:*:*:*:*:*

12 May 2022, 14:34

Type Values Removed Values Added
First Time Oracle manager For Storage Management
CPE cpe:2.3:a:oracle:manager_for_storage_management:13.4.0.0:*:*:*:*:*:*:*
References (MISC) https://www.oracle.com/security-alerts/cpuapr2022.html - (MISC) https://www.oracle.com/security-alerts/cpuapr2022.html - Patch, Third Party Advisory

20 Apr 2022, 00:15

Type Values Removed Values Added
References
  • (MISC) https://www.oracle.com/security-alerts/cpuapr2022.html -

10 Dec 2021, 18:12

Type Values Removed Values Added
References (MISC) https://www.oracle.com/security-alerts/cpuoct2021.html - (MISC) https://www.oracle.com/security-alerts/cpuoct2021.html - Patch, Third Party Advisory
References (CONFIRM) https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44846 - (CONFIRM) https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44846 - Third Party Advisory
References (N/A) https://www.oracle.com//security-alerts/cpujul2021.html - (N/A) https://www.oracle.com//security-alerts/cpujul2021.html - Patch, Third Party Advisory
CPE cpe:2.3:a:oracle:business_intelligence:12.2.1.4.0:*:*:*:enterprise:*:*:*
cpe:2.3:a:oracle:business_intelligence:5.5.0.0.0:*:*:*:enterprise:*:*:*
cpe:2.3:a:oracle:business_intelligence:5.9.0.0.0:*:*:*:enterprise:*:*:*
cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:*
cpe:2.3:a:oracle:jd_edwards_world_security:a9.4:*:*:*:*:*:*:*
cpe:2.3:a:oracle:business_intelligence:12.2.1.3.0:*:*:*:enterprise:*:*:*

20 Oct 2021, 11:16

Type Values Removed Values Added
References
  • (MISC) https://www.oracle.com/security-alerts/cpuoct2021.html -
  • (N/A) https://www.oracle.com//security-alerts/cpujul2021.html -

20 Jul 2021, 23:15

Type Values Removed Values Added
References
  • (CONFIRM) https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44846 -

17 Jun 2021, 17:13

Type Values Removed Values Added
References (MISC) https://www.oracle.com/security-alerts/cpuApr2021.html - (MISC) https://www.oracle.com/security-alerts/cpuApr2021.html - Patch, Third Party Advisory
CPE cpe:2.3:a:oracle:enterprise_manager_ops_center:12.4.0.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:graalvm:21.0.0.2:*:*:*:community:*:*:*
cpe:2.3:a:oracle:graalvm:19.3.5:*:*:*:enterprise:*:*:*
cpe:2.3:a:oracle:graalvm:20.3.1.2:*:*:*:community:*:*:*

14 Jun 2021, 18:15

Type Values Removed Values Added
References
  • (MISC) https://www.oracle.com/security-alerts/cpuApr2021.html -

10 Mar 2021, 20:27

Type Values Removed Values Added
CVSS v2 : 5.0
v3 : 7.5
v2 : 4.3
v3 : 3.7

24 Feb 2021, 00:56

Type Values Removed Values Added
CWE CWE-326
CVSS v2 : unknown
v3 : unknown
v2 : 5.0
v3 : 7.5
CPE cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*
References (CONFIRM) https://security.netapp.com/advisory/ntap-20210219-0009/ - (CONFIRM) https://security.netapp.com/advisory/ntap-20210219-0009/ - Third Party Advisory
References (CONFIRM) https://www.openssl.org/news/secadv/20210216.txt - (CONFIRM) https://www.openssl.org/news/secadv/20210216.txt - Vendor Advisory
References (CONFIRM) https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=30919ab80a478f2d81f2e9acdcca3fa4740cd547 - (CONFIRM) https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=30919ab80a478f2d81f2e9acdcca3fa4740cd547 - Broken Link

19 Feb 2021, 13:15

Type Values Removed Values Added
References
  • (CONFIRM) https://security.netapp.com/advisory/ntap-20210219-0009/ -

16 Feb 2021, 18:00

Type Values Removed Values Added
New CVE

Information

Published : 2021-02-16 17:15

Updated : 2023-12-10 13:41


NVD link : CVE-2021-23839

Mitre link : CVE-2021-23839

CVE.ORG link : CVE-2021-23839


JSON object : View

Products Affected

oracle

  • zfs_storage_appliance_kit
  • graalvm
  • business_intelligence
  • enterprise_manager_for_storage_management
  • enterprise_manager_ops_center
  • jd_edwards_world_security

openssl

  • openssl

siemens

  • sinec_ins
CWE
CWE-327

Use of a Broken or Risky Cryptographic Algorithm