Patch/Configuration Management, Vulnerability Management

Flawed input validation vulnerabilities in 7-Zip result in round of patches

7-Zip, a popular open-source file archiving application used to compress and decompress files, has issued patches for input validation vulnerabilities that can lead to remote code execution. The flaws, both discovered by researcher Marcin Noga, are especially worrisome because 7-Zip business customers, which include vendors of security devices and antivirus solutions, many not be aware that they're using exploitable libraries, explained Cisco's research division Talos in a blog post yesterday.

The first flaw is an out-of-bounds read vulnerability that effects how 7-Zip handles Universal Disk Format (UDF) files – a format for DVD-Video and DVD-Audio. The second is described in the blog as “an exploitable heap overflow vulnerability that exists in the Archive::NHfs::CHandler::ExtractZlibFile method functionality of 7-Zip.”

“Both of these 7-Zip vulnerabilities resulted from flawed input validation. Because data can come from a potentially untrusted source, data input validation is of critical importance to all applications' security,” the blog post concluded.

The latest upgrade to 7-Zip, version 16.00, contains patches for these flaws.

Bradley Barth

As director of multimedia content strategy at CyberRisk Alliance, Bradley Barth develops content for online conferences, webcasts, podcasts video/multimedia projects — often serving as moderator or host. For nearly six years, he wrote and reported for SC Media as deputy editor and, before that, senior reporter. He was previously a program executive with the tech-focused PR firm Voxus. Past journalistic experience includes stints as business editor at Executive Technology, a staff writer at New York Sportscene and a freelance journalist covering travel and entertainment. In his spare time, Bradley also writes screenplays.

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