RHEL 2.1 : unzip (RHSA-2003:200)
Low Nessus Plugin ID 12403
SynopsisThe remote Red Hat host is missing a security update.
DescriptionUpdated unzip packages resolving a vulnerability allowing arbitrary files to be overwritten are now available.
[Updated 15 August 2003] Ben Laurie found that the original patch to fix this issue missed a case where the path component included a quoted slash. These updated packages contain a new patch that corrects this issue.
The unzip utility is used for manipulating archives, which are multiple files stored inside of a single file.
A vulnerabilitiy in unzip version 5.50 and earlier allows attackers to overwrite arbitrary files during archive extraction by placing invalid (non-printable) characters between two '.' characters. These non-printable characters are filtered, resulting in a '..' sequence.
The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2003-0282 to this issue.
This erratum includes a patch ensuring that non-printable characters do not make it possible for a malicious .zip file to write to parent directories unless the '-:' command line parameter is specified.
Users of unzip are advised to upgrade to these updated packages, which are not vulnerable to this issue.
SolutionUpdate the affected unzip package.