远程 CentOS Linux 7 主机上安装的程序包受到 RHSA-2020:3984 公告中提及的多个漏洞影响。

  - 发现 freeradius 及之前版本 3.0.19 未正确配置 logrotate，从而允许已控制 radiusd 用户的本地攻击者诱骗 logrotate 将可写入 radiusd 的文件写入目录，从而将其权限提升为 root。 radiusd 用户通常无法访问。注意：上游软件维护者已声明，任何人都无法通过此所谓的问题获取权限。 (CVE-2019-10143)

  - FreeRADIUS 3.0 到 3.0.19 版本中，每 2048 次 EAP-pwd 握手中平均有 1 次失败，这是因为在搜索和辨别循环的 10 次迭代中无法找到密码元素。此问题会泄露信息，攻击者可利用这些信息恢复任何用户的密码。此信息泄漏类似于 Dragonblood 和 CVE-2019-9494。(CVE-2019-13456)

  - 在 FreeRADIUS 3.0.20 之前的 3.0.x 中，EAP-pwd 模块使用全局 OpenSSL BN_CTX 实例来处理所有的握手。这意味着多个线程会同时使用同一 BN_CTX 实例，从而在发起同时 EAP-pwd 握手时导致崩溃。攻击者可滥用此问题，发起拒绝服务 (DoS) 攻击。(CVE-2019-17185)

请注意，Nessus 尚未测试这些问题，而是只依据应用程序自我报告的版本号进行判断。

安全修复：

  - freeradius：由于不安全的 logrotate 配置所导致的权限升级 (CVE-2019-10143)

  - freeradius：eap-pwd：由于需要超过 10 个迭代时中止而导致的信息泄漏 (CVE-2019-13456)

  - freeradius：eap-pwd：由于多线程 BN_CTX 访问所导致的 DoS 问题 (CVE-2019-17185)

运行 CORE 5.04 / MAIN 5.04 版本的远程 NewStart CGSL 主机上安装的 freeradius 程序包受到多个漏洞的影响：

  - 在 FreeRADIUS 3.0.20 之前的 3.0.x 中，EAP-pwd 模块使用全局 OpenSSL BN_CTX 实例来处理所有的握手。这意味着多个线程会同时使用同一 BN_CTX 实例，从而在发起同时 EAP-pwd 握手时导致崩溃。攻击者可滥用此问题，发起拒绝服务 (DoS) 攻击。(CVE-2019-17185)

  - **存在争议** 据发现，freeradius 3.0.19 及其之前版本未正确配置 logrotate，已经控制 radiusd 用户的本地攻击者可利用此问题，通过诱骗 logrotate 在 radiusd 用户通常无法访问的目录中写入 radiusd 可写文件，将其权限提升为根权限。注意：上游软件维护者表示，任何人都无法通过此所谓的问题获取权限。(CVE-2019-10143)

  - FreeRADIUS 3.0 到 3.0.19 版本中，每 2048 次 EAP-pwd 握手中平均有 1 次失败，这是因为在搜索和辨别循环的 10 次迭代中无法找到密码元素。此问题会泄露信息，攻击者可利用这些信息恢复任何用户的密码。此信息泄漏类似于 Dragonblood 和 CVE-2019-9494。(CVE-2019-13456)

请注意，Nessus 尚未测试此问题，而是只依赖于应用程序自我报告的版本号。

According to the version of the freeradius package installed, the EulerOS installation on the remote host is affected by the following vulnerability :

  - In FreeRADIUS 3.0.x before 3.0.20, the EAP-pwd module     used a global OpenSSL BN_CTX instance to handle all     handshakes. This mean multiple threads use the same     BN_CTX instance concurrently, resulting in crashes when     concurrent EAP-pwd handshakes are initiated. This can     be abused by an adversary as a Denial-of-Service (DoS)     attack.(CVE-2019-17185)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2020:4799 advisory.

    FreeRADIUS is a high-performance and highly configurable free Remote Authentication Dial In User Service     (RADIUS) server, designed to allow centralized authentication and authorization for a network.

    Security Fix(es):

    * freeradius: eap-pwd: DoS issues due to multithreaded BN_CTX access (CVE-2019-17185)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

    Additional Changes:

    For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.3 Release Notes     linked from the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2020-3984 advisory.

    [3.0.13-15]
    - Fixes EAP-PWD: DoS issues due to multithreaded BN_CTX access       Resolves: bz#1818808

      [3.0.13-14
    - Fixes receiving of multiple RADIUS packets under load       Resolves: bz#1630684

    [3.0.13-13]
    - Fixes logging of cleartext pap password       Resolves: bz#1677435

    [3.0.13-12]
    - Fixes paircompare with attribute references and expansions       Resolves: bz#1592741

    [3.0.13-11]
    - Fixes logrotate, EAP-PWD vulnerability       Resolves: bz#1719368 privilege escalation due to insecure logrotate configuration       Resolves: bz#1751796 eap-pwd: Information leak due to aborting when needing more than 10 iterations

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote CentOS Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:3984 advisory.

  - It was discovered freeradius up to and including version 3.0.19 does not correctly configure logrotate,     allowing a local attacker who already has control of the radiusd user to escalate his privileges to root,     by tricking logrotate into writing a radiusd-writable file to a directory normally inaccessible by the     radiusd user. NOTE: the upstream software maintainer has stated there is simply no way for anyone to gain     privileges through this alleged issue. (CVE-2019-10143)

  - In FreeRADIUS 3.0 through 3.0.19, on average 1 in every 2048 EAP-pwd handshakes fails because the password     element cannot be found within 10 iterations of the hunting and pecking loop. This leaks information that     an attacker can use to recover the password of any user. This information leakage is similar to the     Dragonblood attack and CVE-2019-9494. (CVE-2019-13456)

  - In FreeRADIUS 3.0.x before 3.0.20, the EAP-pwd module used a global OpenSSL BN_CTX instance to handle all     handshakes. This mean multiple threads use the same BN_CTX instance concurrently, resulting in crashes     when concurrent EAP-pwd handshakes are initiated. This can be abused by an adversary as a Denial-of-     Service (DoS) attack. (CVE-2019-17185)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Security Fix(es) :

  - freeradius: privilege escalation due to insecure     logrotate configuration (CVE-2019-10143)

  - freeradius: eap-pwd: Information leak due to aborting     when needing more than 10 iterations (CVE-2019-13456)

  - freeradius: eap-pwd: DoS issues due to multithreaded     BN_CTX access (CVE-2019-17185)

The remote NewStart CGSL host, running version CORE 5.04 / MAIN 5.04, has freeradius packages installed that are affected by multiple vulnerabilities:

  - In FreeRADIUS 3.0.x before 3.0.20, the EAP-pwd module used a global OpenSSL BN_CTX instance to handle all     handshakes. This mean multiple threads use the same BN_CTX instance concurrently, resulting in crashes     when concurrent EAP-pwd handshakes are initiated. This can be abused by an adversary as a Denial-of-     Service (DoS) attack. (CVE-2019-17185)

  - ** DISPUTED ** It was discovered freeradius up to and including version 3.0.19 does not correctly     configure logrotate, allowing a local attacker who already has control of the radiusd user to escalate his     privileges to root, by tricking logrotate into writing a radiusd-writable file to a directory normally     inaccessible by the radiusd user. NOTE: the upstream software maintainer has stated there is simply no     way for anyone to gain privileges through this alleged issue. (CVE-2019-10143)

  - In FreeRADIUS 3.0 through 3.0.19, on average 1 in every 2048 EAP-pwd handshakes fails because the password     element cannot be found within 10 iterations of the hunting and pecking loop. This leaks information that     an attacker can use to recover the password of any user. This information leakage is similar to the     Dragonblood attack and CVE-2019-9494. (CVE-2019-13456)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
141587	CentOS 7：freeradius(RHSA-2020:3984)	Nessus	CentOS Local Security Checks	2020/10/20	2024/10/9	high
141703	Scientific Linux 安全更新：SL7.x x86_64 上的 freeradius (20201001)	Nessus	Scientific Linux Local Security Checks	2020/10/21	2020/10/23	high
147253	NewStart CGSL CORE 5.04 / MAIN 5.04：freeradius 多个漏洞 (NS-SA-2021-0037)	Nessus	NewStart CGSL Local Security Checks	2021/3/10	2021/3/10	high
142346	EulerOS 2.0 SP2 : freeradius (EulerOS-SA-2020-2342)	Nessus	Huawei Local Security Checks	2020/11/3	2024/2/12	high
142410	RHEL 8 : freeradius:3.0 (RHSA-2020:4799)	Nessus	Red Hat Local Security Checks	2020/11/4	2024/11/7	high
141233	Oracle Linux 7 : freeradius (ELSA-2020-3984)	Nessus	Oracle Linux Local Security Checks	2020/10/7	2024/11/1	high
141587	CentOS 7 : freeradius (RHSA-2020:3984)	Nessus	CentOS Local Security Checks	2020/10/20	2024/10/9	high
141703	Scientific Linux Security Update : freeradius on SL7.x x86_64 (20201001)	Nessus	Scientific Linux Local Security Checks	2020/10/21	2020/10/23	high
147253	NewStart CGSL CORE 5.04 / MAIN 5.04 : freeradius Multiple Vulnerabilities (NS-SA-2021-0037)	Nessus	NewStart CGSL Local Security Checks	2021/3/10	2021/3/10	high

检测

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