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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT Security Bulletin ASB-2020.0076 Oracle CPU April 2020 for Java SE 15 April 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Oracle Java SE Operating System: Windows UNIX variants (UNIX, Linux, OSX) Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated Modify Arbitrary Files -- Remote/Unauthenticated Denial of Service -- Remote/Unauthenticated Access Confidential Data -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2020-2830 CVE-2020-2816 CVE-2020-2805 CVE-2020-2803 CVE-2020-2800 CVE-2020-2781 CVE-2020-2778 CVE-2020-2773 CVE-2020-2767 CVE-2020-2764 CVE-2020-2757 CVE-2020-2756 CVE-2020-2755 CVE-2020-2754 CVE-2019-18197 Member content until: Friday, May 15 2020 Reference: ASB-2020.0034 ESB-2019.3929 OVERVIEW Multiple vulnerabilities have been identified in : o Java Advanced Management Console, version 2.16 o Oracle Java SE, versions 7u251, 8u241, 11.0.6, 14 o Oracle Java SE Embedded, version 8u241 [1] IMPACT The vendor has provided the following information regarding the vulnerabilities: "This Critical Patch Update contains 15 new security patches for Oracle Java SE. All of these vulnerabilities may be remotely exploitable without authentication, i.e., may be exploited over a network without requiring user credentials." [1] CVE-2020-2803 8.3 AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H ( legend ) [ Advisory Supported versions that are affected are Java SE: 7u251, 8u241, 11.0.6 and 14; Java SE Embedded: 8u241. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Java SE, Java SE Embedded. Successful attacks require human interaction from a person other than the attacker and while the vulnerability is in Java SE, Java SE Embedded, attacks may significantly impact additional products. Successful attacks of this vulnerability can result in takeover of Java SE, Java SE Embedded. Note : This vulnerability applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets, that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. This vulnerability does not apply to Java deployments, typically in servers, that load and run only trusted code (e.g., code installed by an administrator). Affects: o Java SE, Java SE Embedded Java SE: 7u251, 8u241, 11.0.6, 14; Java SE Embedded: 8u241 CVE-2020-2805 8.3 AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H ( legend ) [ Advisory Supported versions that are affected are Java SE: 7u251, 8u241, 11.0.6 and 14; Java SE Embedded: 8u241. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Java SE, Java SE Embedded. Successful attacks require human interaction from a person other than the attacker and while the vulnerability is in Java SE, Java SE Embedded, attacks may significantly impact additional products. Successful attacks of this vulnerability can result in takeover of Java SE, Java SE Embedded. Note : This vulnerability applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets, that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. This vulnerability does not apply to Java deployments, typically in servers, that load and run only trusted code (e.g., code installed by an administrator). Affects: o Java SE, Java SE Embedded Java SE: 7u251, 8u241, 11.0.6, 14; Java SE Embedded: 8u241 CVE-2019-18197 8.1 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H ( legend ) [ Advisory The supported version that is affected is Java SE: 8u241. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Java SE. Successful attacks of this vulnerability can result in takeover of Java SE. Note : This vulnerability applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets, that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. This vulnerability does not apply to Java deployments, typically in servers, that load and run only trusted code (e.g., code installed by an administrator). Affects: o Java SE Java SE: 8u241 CVE-2020-2816 7.5 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N ( legend ) [ Advisory Supported versions that are affected are Java SE: 11.0.6 and 14. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTPS to compromise Java SE. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Java SE accessible data. Note : This vulnerability can only be exploited by supplying data to APIs in the specified Component without using Untrusted Java Web Start applications or Untrusted Java applets, such as through a web service. Affects: o Java SE Java SE: 11.0.6, 14 CVE-2020-2781 5.3 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L ( legend ) [ Advisory Supported versions that are affected are Java SE: 7u251, 8u241, 11.0.6 and 14; Java SE Embedded: 8u241. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTPS to compromise Java SE, Java SE Embedded. Successful attacks of this vulnerability can result in unauthorized ability to cause a partial denial of service (partial DOS) of Java SE, Java SE Embedded. Note : Applies to client and server deployment of Java. This vulnerability can be exploited through sandboxed Java Web Start applications and sandboxed Java applets. It can also be exploited by supplying data to APIs in the specified Component without using sandboxed Java Web Start applications or sandboxed Java applets, such as through a web service. Affects: o Java SE, Java SE Embedded Java SE: 7u251, 8u241, 11.0.6, 14; Java SE Embedded: 8u241 CVE-2020-2830 5.3 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L ( legend ) [ Advisory Supported versions that are affected are Java SE: 7u251, 8u241, 11.0.6 and 14; Java SE Embedded: 8u241. Easily exploitable vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Java SE, Java SE Embedded. Successful attacks of this vulnerability can result in unauthorized ability to cause a partial denial of service (partial DOS) of Java SE, Java SE Embedded. Note : Applies to client and server deployment of Java. This vulnerability can be exploited through sandboxed Java Web Start applications and sandboxed Java applets. It can also be exploited by supplying data to APIs in the specified Component without using sandboxed Java Web Start applications or sandboxed Java applets, such as through a web service. Affects: o Java SE, Java SE Embedded Java SE: 7u251, 8u241, 11.0.6, 14; Java SE Embedded: 8u241 CVE-2020-2767 4.8 AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N ( legend ) [ Advisory Supported versions that are affected are Java SE: 11.0.6 and 14. Difficult to exploit vulnerability allows unauthenticated attacker with network access via HTTPS to compromise Java SE. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Java SE accessible data as well as unauthorized read access to a subset of Java SE accessible data. Note : Applies to client and server deployment of Java. This vulnerability can be exploited through sandboxed Java Web Start applications and sandboxed Java applets. It can also be exploited by supplying data to APIs in the specified Component without using sandboxed Java Web Start applications or sandboxed Java applets, such as through a web service. Affects: o Java SE Java SE: 11.0.6, 14 CVE-2020-2800 4.8 AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N ( legend ) [ Advisory Supported versions that are affected are Java SE: 7u251, 8u241, 11.0.6 and 14; Java SE Embedded: 8u241. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Java SE, Java SE Embedded. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Java SE, Java SE Embedded accessible data as well as unauthorized read access to a subset of Java SE, Java SE Embedded accessible data. Note : This vulnerability can only be exploited by supplying data to APIs in the specified Component without using Untrusted Java Web Start applications or Untrusted Java applets, such as through a web service. Affects: o Java SE, Java SE Embedded Java SE: 7u251, 8u241, 11.0.6, 14; Java SE Embedded: 8u241 CVE-2020-2778 3.7 AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N ( legend ) [ Advisory Supported versions that are affected are Java SE: 11.0.6 and 14. Difficult to exploit vulnerability allows unauthenticated attacker with network access via HTTPS to compromise Java SE. Successful attacks of this vulnerability can result in unauthorized read access to a subset of Java SE accessible data. Note : Applies to client and server deployment of Java. This vulnerability can be exploited through sandboxed Java Web Start applications and sandboxed Java applets. It can also be exploited by supplying data to APIs in the specified Component without using sandboxed Java Web Start applications or sandboxed Java applets, such as through a web service. Affects: o Java SE Java SE: 11.0.6, 14 CVE-2020-2764 3.7 AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N ( legend ) [ Advisory The supported version that is affected is Java Advanced Management Console: 2.16. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Java SE. Successful attacks of this vulnerability can result in unauthorized read access to a subset of Java SE accessible data. Note : This vulnerability can only be exploited by supplying data to APIs in the specified Component without using Untrusted Java Web Start applications or Untrusted Java applets, such as through a web service. Affects: o Java SE Java Advanced Management Console: 2.16 CVE-2020-2754 3.7 AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L ( legend ) [ Advisory Supported versions that are affected are Java SE: 8u241, 11.0.6 and 14; Java SE Embedded: 8u241. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Java SE, Java SE Embedded. Successful attacks of this vulnerability can result in unauthorized ability to cause a partial denial of service (partial DOS) of Java SE, Java SE Embedded. Note : Applies to client and server deployment of Java. This vulnerability can be exploited through sandboxed Java Web Start applications and sandboxed Java applets. It can also be exploited by supplying data to APIs in the specified Component without using sandboxed Java Web Start applications or sandboxed Java applets, such as through a web service. Affects: o Java SE, Java SE Embedded Java SE: 8u241, 11.0.6, 14; Java SE Embedded: 8u241 CVE-2020-2755 3.7 AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L ( legend ) [ Advisory Supported versions that are affected are Java SE: 8u241, 11.0.6 and 14; Java SE Embedded: 8u241. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Java SE, Java SE Embedded. Successful attacks of this vulnerability can result in unauthorized ability to cause a partial denial of service (partial DOS) of Java SE, Java SE Embedded. Note : Applies to client and server deployment of Java. This vulnerability can be exploited through sandboxed Java Web Start applications and sandboxed Java applets. It can also be exploited by supplying data to APIs in the specified Component without using sandboxed Java Web Start applications or sandboxed Java applets, such as through a web service. Affects: o Java SE, Java SE Embedded Java SE: 8u241, 11.0.6, 14; Java SE Embedded: 8u241 CVE-2020-2773 3.7 AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L ( legend ) [ Advisory Supported versions that are affected are Java SE: 7u251, 8u241, 11.0.6 and 14; Java SE Embedded: 8u241. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Java SE, Java SE Embedded. Successful attacks of this vulnerability can result in unauthorized ability to cause a partial denial of service (partial DOS) of Java SE, Java SE Embedded. Note : Applies to client and server deployment of Java. This vulnerability can be exploited through sandboxed Java Web Start applications and sandboxed Java applets. It can also be exploited by supplying data to APIs in the specified Component without using sandboxed Java Web Start applications or sandboxed Java applets, such as through a web service. Affects: o Java SE, Java SE Embedded Java SE: 7u251, 8u241, 11.0.6, 14; Java SE Embedded: 8u241 CVE-2020-2756 3.7 AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L ( legend ) [ Advisory Supported versions that are affected are Java SE: 7u251, 8u241, 11.0.6 and 14; Java SE Embedded: 8u241. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Java SE, Java SE Embedded. Successful attacks of this vulnerability can result in unauthorized ability to cause a partial denial of service (partial DOS) of Java SE, Java SE Embedded. Note : Applies to client and server deployment of Java. This vulnerability can be exploited through sandboxed Java Web Start applications and sandboxed Java applets. It can also be exploited by supplying data to APIs in the specified Component without using sandboxed Java Web Start applications or sandboxed Java applets, such as through a web service. Affects: o Java SE, Java SE Embedded Java SE: 7u251, 8u241, 11.0.6, 14; Java SE Embedded: 8u241 CVE-2020-2757 3.7 AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L ( legend ) [ Advisory Supported versions that are affected are Java SE: 7u251, 8u241, 11.0.6 and 14; Java SE Embedded: 8u241. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Java SE, Java SE Embedded. Successful attacks of this vulnerability can result in unauthorized ability to cause a partial denial of service (partial DOS) of Java SE, Java SE Embedded. Note : Applies to client and server deployment of Java. This vulnerability can be exploited through sandboxed Java Web Start applications and sandboxed Java applets. It can also be exploited by supplying data to APIs in the specified Component without using sandboxed Java Web Start applications or sandboxed Java applets, such as through a web service. Affects: o Java SE, Java SE Embedded Java SE: 7u251, 8u241, 11.0.6, 14; Java SE Embedded: 8u241 [1] MITIGATION Oracle states: "Due to the threat posed by a successful attack, Oracle strongly recommends that customers apply CPU fixes as soon as possible. Until you apply the CPU fixes, it may be possible to reduce the risk of successful attack by blocking network protocols required by an attack. For attacks that require certain privileges or access to certain packages, removing the privileges or the ability to access the packages from users that do not need the privileges may help reduce the risk of successful attack. Both approaches may break application functionality, so Oracle strongly recommends that customers test changes on non-production systems. Neither approach should be considered a long-term solution as neither corrects the underlying problem." [1] REFERENCES [1] Oracle Critical Patch Update Advisory - April 2020 https://www.oracle.com/security-alerts/cpuapr2020.html [2] Text Form of Oracle Critical Patch Update - April 2020 Risk Matrices https://www.oracle.com/security-alerts/cpuapr2020verbose.html AusCERT has made every effort to ensure that the information contained in this document is accurate. However, the decision to use the information described is the responsibility of each user or organisation. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBXpZ4YGaOgq3Tt24GAQgRbw//Yee+XhNb4AgQEDa+BOpFNBSDruzulEwI d1cPOVQmm54pYe5h7BzsH+A5HW1wuGf3i+A8lR9OvTNlKdd5yxoV52ryfZ/3EHB9 n6sZAs7Bpyxa1tNLSoEy6MfCv+S3/EauF99w1EthK/LBfXG7q1Dz0d3fc8NwjJPA vOGgwNK6vK6m0s+AX5wAwbI0K6Zk/xbtzFb/Y1bXpHLQWjFtDqlpCK2/B9k+PmsP cL5K2QSr6UDR//bbSaIGRQ1PCg3m6LrvNS0eRZI0W8Ue6qgSUGDt+6Fd5VmfyZwj +th5khedeRzmdl1m5K0Zy537J2auWIA+RoPpNpWhMRS8bD3mSos0C84fKV92p6VG nQD9HhuX9GQ9oUufquwoNUx4ZvPI8dczc58aijNnO6J+RffIFtZGk7cfHakYW3AO CG1GKPV7pnhkVKB4dfP8wBs3+sYh4ovgAClxspWgC/ZnWHIi9J9E7DXeCOmcts6D 3840Rx0VGNqduLTiB7DcGXXJ6+dyA5GQpI+0OB2/bTSJfqlGDtJJd1fO2JDcMPTF KVoL3w3mbfhg7GV2oXvlGsAzzetkMfwP8YbwYHOEmAqCoK8Hxq+2Paotn2drTuI0 ovNgui18zbRWfG3gfoDB4diPWZrAKDXnUtQTS7l6FtdxEHgiYH6aiYF9tHYeG4Wb NwnM3WYrFzY= =Ey5p -----END PGP SIGNATURE-----