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Invalid read when wddx decodes empty boolean element

内存破坏 / 内存破坏(通用) / #188661

厂商
Internet Bug Bounty
严重程度
低危
赏金
—
弱点
内存破坏(通用)
研究员
@fosec
披露日期
2019-11-12
资产
PHP
CVE
—

该报告还没有中文解读。

原文摘录

摘自原文(6847 字符中的一小部分)
Description ----------- I have found some vulnerable code in wddx extension. The trouble happens when trying to process 'boolean' tag. If I open <boolean> tag without data, new st_entry item WILL NOT be pushed into stack. When <boolean> tag is closed and stack->top is greater than 1, st_entry item …
原文中的代码
static void php_wddx_push_element(void *user_data, const XML_Char *name, const XML_Char **atts)
{
	.....
	} else if (!strcmp((char *)name, EL_BOOLEAN)) {
		int i;

		if (atts) for (i = 0; atts[i]; i++) {
			if (!strcmp((char *)atts[i], EL_VALUE) && atts[i+1] && atts[i+1][0]) {
				ent.type = …

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时间线

  • 报告提交
  • 公开披露
阅读 HackerOne 原文 ↗作者 @fosec · 版权归作者与 Internet Bug Bounty 所有

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