A null pointer dereference bug affects the 16.02 and many old versions of p7zip. A lack of null pointer check for the variable folders.PackPositions in function CInArchive::ReadAndDecodePackedStreams in CPP/7zip/Archive/7z/7zIn.cpp, as used in the 7z.so library and in 7z applications, will cause a crash and a denial of service when decoding malformed 7z files.
A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| P7zip | 7-zip | 16.02 (including) | 16.02 (including) |
| P7zip | Ubuntu | artful | * |
| P7zip | Ubuntu | precise | * |
| P7zip | Ubuntu | upstream | * |
| P7zip | Ubuntu | yakkety | * |
| P7zip | Ubuntu | zesty | * |