[COMPRESS-479] Unable to extract Zip with unknown UniCode path extra data version

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.18
• Fix Version/s: 1.19
• Component/s: Archivers
• Labels: zip
• Assignee: Unassigned
• Reporter: Robin Schimpf
• Created: 31/Jan/19 10:26
• Updated: 19/Aug/19 05:05
• Resolved: 17/Aug/19 10:43

Description

The following exception is thrown when the version of the UniCode path extra data version is not 1. 7-Zip and Windows Explorer will extract the attached file. The version in the file was changed via a Hex editor to provoke the error.

java.lang.RuntimeException: Error parsing extra fields for entry: %U20AC_for_Dollar.txt - Unsupported version [116] for UniCode path extra data.

	at org.apache.commons.compress.archivers.zip.ZipArchiveEntry.setExtra(ZipArchiveEntry.java:626)
	at org.apache.commons.compress.archivers.zip.ZipArchiveInputStream.getNextZipEntry(ZipArchiveInputStream.java:315)
	at org.apache.commons.compress.archivers.zip.ZipArchiveInputStream.getNextEntry(ZipArchiveInputStream.java:408)
	at org.apache.commons.compress.archivers.zip.UTF8ZipFilesTest.testZipFileReadsUnicodeFields(UTF8ZipFilesTest.java:186)
...
Caused by: java.util.zip.ZipException: Unsupported version [116] for UniCode path extra data.
	at org.apache.commons.compress.archivers.zip.AbstractUnicodeExtraField.parseFromLocalFileData(AbstractUnicodeExtraField.java:172)
	at org.apache.commons.compress.archivers.zip.ExtraFieldUtils.parse(ExtraFieldUtils.java:180)
	at org.apache.commons.compress.archivers.zip.ZipArchiveEntry.setExtra(ZipArchiveEntry.java:620)

As I understand the specification in Section 4.6.8 and 4.6.9 when the version is unknown the information shoule be ignored.

Changes MAY NOT be backward compatible so this extra field SHOULD NOT be used if the version is not recognized.

Issue Links

• links to: GitHub Pull Request #75