Facebook Google Plus Twitter LinkedIn YouTube RSS Menu Search Resource - BlogResource - WebinarResource - ReportResource - Eventicons_066 icons_067icons_068icons_069icons_070

Tenable 博客

订阅

CVE-2019-17558: Apache Solr Vulnerable to Remote Code Execution Zero-Day Vulnerability

Apache Solr remained vulnerable to a zero-day weeks after proof-of-concept code became public for CVE-2019-17558.

UPDATE 12/31/2019: The background and solution sections below have been updated to reflect the recent security update released by Apache.

背景

On October 29, a proof of concept (PoC) for a remote code execution (RCE) vulnerability in Apache Solr, a popular open-source search platform built on Apache Lucene, was published as a GitHub Gist. At the time this blog post was published, this vulnerability did not have a CVE identifier and no confirmation or indication of a solution available from Apache. However, Apache recently announced releases of Solr to address this vulnerability, which is now identified as CVE-2019-17558Tenable Research confirmed that Apache Solr versions 7.7.2 through 8.3 were vulnerable at the time this blog post was originally published. After the announcement from Apache was released, we can now confirm versions 5.0.0 to 8.3.1 are affected.

分析

According to the PoC, an attacker could target a vulnerable Apache Solr instance by first identifying a list of Solr core names. Once the core names have been identified, an attacker can send a specially crafted HTTP POST request to the Config API to toggle the params resource loader value for the Velocity Response Writer in the solrconfig.xml file to true.

solrconfig.xml

Enabling this parameter would allow an attacker to use the velocity template parameter in a specially crafted Solr request, leading to RCE.

solr RCE web

Despite the recent release of Apache Solr 8.3 that addresses a default configuration flaw that was reported back in July, this flaw remained a zero-day until December 29.

概念验证

As mentioned previously, a PoC was published on October 29 as a Github Gist. Days later, an exploit script was published to a GitHub repository.

解决方案

On December 3, Apache released Solr version 8.3.1, which reportedly addressed CVE-2019-17558 as referenced in SOLR-13971. However, following the release of 8.3.1, researcher Peter Cseh of Cloudera reported the fix as incomplete to the Apache Solr team, resulting in the hardening of VelocityResponseWriter as part of Solr version 8.4. According to the advisory, “Solr 8.4 removed the params resource loader entirely, and only enables the configset-provided template rendering when the configset is `trusted` (has been uploaded by an authenticated user).”

识别受影响的系统

A list of Tenable plugins to identify this vulnerability will appear here as they’re released.

获取更多信息

加入 Tenable Community 中的 Tenable 安全响应团队

了解有关 Tenable 这款首创 Cyber Exposure 平台的更多信息,全面管理现代攻击面。

获取 30 天免费试用版 Tenable.io Vulnerability Management

相关文章

您是否易受最新漏洞利用的攻击?

输入您的电子邮件以在收件箱中接收最新的 Cyber Exposure 警报。

tenable.io

免费试用 30 天


可全面访问基于云的现代化漏洞管理平台,从而以无可比拟的精确度发现并追踪所有资产。

tenable.io 购买

可全面访问基于云的现代化漏洞管理平台,从而以无可比拟的精确度发现并追踪所有资产。 立即购买年度订阅。

65 项资产

选择您的订阅选项:

立即购买

免费试用 Nessus Professional

免费试用 7 天

Nessus® 是当今市场上功能最全面的漏洞扫描器。Nessus Professional 可帮助自动化漏洞扫描流程、节省合规周期的时间,并让您调动起 IT 团队的积极性。

购买 Nessus Professional

Nessus® 是当今市场上功能最全面的漏洞扫描器。Nessus Professional 可帮助自动化漏洞扫描流程、节省合规周期的时间,并让您调动起 IT 团队的积极性。

购买多年期许可,即享优惠价格添加高级支持功能,获取一年 365 天、一天 24 小时的电话、社区和聊天支持。

选择您的许可证

购买多年期许可,即享优惠价格

添加支持和培训

Tenable.io 免费试用 30 天

可全面访问基于云的现代化漏洞管理平台,从而以无可比拟的精确度发现并追踪所有资产。

Tenable.io 购买

可全面访问基于云的现代化漏洞管理平台,从而以无可比拟的精确度发现并追踪所有资产。 立即购买年度订阅。

65 项资产

选择您的订阅选项:

立即购买

试用 Tenable.io Web Application Scanning

免费试用 30 天

完整享有专为现代化应用程序而设、属于 Tenable.io 平台组成部分的最新 Web 应用程序扫描功能。可安全扫描全部在线资产组合的漏洞,具有高度准确性,而且无需繁重的手动操作或中断关键的 Web 应用程序。 立即注册。

购买 Tenable.io Web Application Scanning

可全面访问基于云的现代化漏洞管理平台,从而以无可比拟的精确度发现并追踪所有资产。 立即购买年度订阅。

5 个 FQDN

$3,578

立即购买

试用 Tenable.io Container Security

免费试用 30 天

完整获得已集成至漏洞管理平台之唯一容器安全产品的功能。监控容器映像中的漏洞、恶意软件和策略违规。与持续集成和持续部署 (CI/CD) 系统进行整合,以支持 DevOps 实践、增强安全性并支持企业政策合规。

购买 Tenable.io Container Security

Tenable.io Container Security 经由与构建流程的集成,可供全面了解容器映像的安全性,包括漏洞、恶意软件和策略违规,借以无缝且安全地启用 DevOps 流程。

试用 Tenable Lumin

免费试用 30 天

通过 Tenable Lumin 直观呈现及探索 Cyber Exposure,长期追踪风险降低状况,并比照同行业者进行基准度量。

购买 Tenable Lumin

联系销售代表,了解 Lumin 如何帮助获取整个企业的洞见并管理网络安全风险。

试用 Tenable.cs

免费试用 30 天 在软件开发生命周期的设计、构建和运行时阶段,享有检测和修复云基础架构错误配置的完全访问权限。

购买 Tenable.cs

联系销售代表,了解有关云安全的更多信息,以及如何从代码到云,全程护航。