A vulnerability was found in UPX up to 4.2.2. It has been rated as critical. This issue affects the function getne64 of the file bele.h. The manipulation leads to heap-based buffer overflow. The exploit has been disclosed to the public and may be used. The associated identifier of this vulnerability is VDB-259055. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

A vulnerability, which was classified as problematic, was found in UPX up to 5.0.0. Affected is the function PackLinuxElf64::unDTINIT of the file src/plxelf.cpp. The manipulation leads to heap-based buffer overflow. It is possible to launch the attack on the local host. The exploit has been disclosed to the public and may be used. The patch is identified as e0b6ff192412f5bb5364c1948f4f6b27a0cd5ea2. It is recommended to apply a patch to fix this issue.

Null pointer dereference was found in upx PackLinuxElf::canUnpack() in plxelf.cpp,in version UPX 4.0.0. That allow attackers to execute arbitrary code and cause a denial of service via a crafted file.

Upstream issue:

https://github.com/upx/upx/issues/48

Upstream patch:

https://github.com/upx/upx/commit/90279abdfcd235172eab99651043051188938dcc

An assertion abort was found in upx MemBuffer::alloc() in mem.cpp, in version UPX 4.0.1. The flow allows attackers to cause a denial of service (abort) via a crafted file.

https://github.com/upx/upx/issues/632 https://github.com/upx/upx/commit/510505a85cbe45e51fbd470f1aa8b02157c429d4

A Segmentation fault was found in UPX in invertptdynamic() function in plxelf.cpp. An attacker with a crafted input file allows invalid memory address access that could lead to a denial of service.

https://github.com/upx/upx/issues/631 https://github.com/upx/upx/commit/779b648c5f6aa9b33f4728f79dd4d0efec0bf860

A flaw was found in upx canPack in plxelf.cpp in UPX 3.96 that allows attackers to cause a denial of service (SEGV or buffer overflow, and application crash) or possibly have unspecified other impacts via a crafted ELF.

Upstream issue:

https://github.com/upx/upx/issues/421

An assertion abort was found in upx MemBuffer::alloc() in mem.cpp, in version UPX 4.0.0. The flow allows attackers to cause a denial of service (abort) via a crafted file.

Upstream issue:

https://github.com/upx/upx/issues/486

Upstream patch: https://github.com/upx/upx/pull/487 https://github.com/upx/upx/commit/28e761cd42211dfe0124b7a29b2f74730f453e46