漏洞描述

Xpdf是Foo实验室的一款开源的PDF阅读器。该产品支持解码LZW压缩格式的文件以及阅读加密的PDF文件。 Xpdf 4.01版本中的TextOutputDev.c文件的‘TextPage::findGaps()’函数存在安全漏洞。攻击者可通过发送特制的pdf文件利用该漏洞造成拒绝服务（段错误）。

There is an invalid memory access vulnerability in the function TextPage::findGaps() located at TextOutputDev.c in Xpdf 4.01, which can (for example) be triggered by sending a crafted pdf file to the pdftops binary. It allows an attacker to cause Denial of Service (Segmentation fault) or possibly have unspecified other impact.