Directory traversal vulnerability in UnZip 5.50 allows attackers to overwrite arbitrary files via invalid characters between two . (dot) characters, which are filtered and result in a ".." sequence.

A null pointer dereference was found in unzip. The bug appears to be located in the code responsible for handling Unicode strings. This allows an attacker to perform a denial of service and possibly opens up other attack vectors.

References:

https://bugs.launchpad.net/ubuntu/+source/unzip/+bug/1957077

Directory traversal vulnerability in Info-ZIP UnZip 5.42 and earlier allows attackers to overwrite arbitrary files during archive extraction via a .. (dot dot) in an extracted filename.

Info-ZIP UnZip 5.42 and earlier allows attackers to overwrite arbitrary files during archive extraction via filenames in the archive that begin with the '/' (slash) character.

Buffer overflow in UnZip 5.50 and earlier allows user-assisted attackers to execute arbitrary code via a long filename command line argument. NOTE: since the overflow occurs in a non-setuid program, there are not many scenarios under which it poses a vulnerability, unless unzip is passed long arguments when it is invoked from other programs.

Race condition in Unzip 5.52 allows local users to modify permissions of arbitrary files via a hard link attack on a file while it is being decompressed, whose permissions are changed by Unzip after the decompression is complete.

Unzip 5.51 and earlier does not properly warn the user when extracting setuid or setgid files, which may allow local users to gain privileges.