An invalid memory address dereference was discovered in the canUnpack function in p_mach.cpp in UPX 3.95 via a crafted Mach-O file.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - An invalid memory address dereference was discovered in the canUnpack function in p_mach.cpp in UPX 3.95     via a crafted Mach-O file. (CVE-2019-20053)

Note that Nessus relies on the presence of the package as reported by the vendor.

There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:

  - PackLinuxElf64::unpack in p_lx_elf.cpp in UPX 3.95 allows remote attackers to cause a denial of service
    (double free), limit the ability of a malware scanner to operate on the entire original data, or possibly
    have unspecified other impact via a crafted file. (CVE-2018-11243)

  - canUnpack in p_vmlinx.cpp in UPX 3.95 allows remote attackers to cause a denial of service (SEGV or buffer
    overflow, and application crash) or possibly have unspecified other impact via a crafted UPX packed file.
    (CVE-2019-14296)

  - A heap-based buffer over-read was discovered in canUnpack in p_mach.cpp in UPX 3.95 via a crafted Mach-O
    file. (CVE-2019-20021)

  - An invalid memory address dereference was discovered in the canUnpack function in p_mach.cpp in UPX 3.95
    via a crafted Mach-O file. (CVE-2019-20053)

This update for upx to version 3.96 fixes the following issues :

  - CVE-2019-1010048: Fixed a denial of service in     PackLinuxElf32::PackLinuxElf32help1() (boo#1141777).

  - CVE-2019-14296: Fixed a denial of service in canUnpack()     (boo#1143839).

  - CVE-2019-20021: Fixed a heap-based buffer over-read in     canUnpack() (boo#1159833).

  - CVE-2019-20053: Fixed a denial of service in canUnpack()     (boo#1159920).

  - CVE-2018-11243: Fixed a denial of service in     PackLinuxElf64::unpack() (boo#1094138).

  - Update to version 3.96

  - Bug fixes: [CVE-2019-1010048, boo#1141777]     [CVE-2019-14296, boo#1143839] [CVE-2019-20021,     boo#1159833] [CVE-2019-20053, boo#1159920]     [CVE-2018-11243 partially - ticket 206 ONLY,     boo#1094138]

  - Update to version 3.95

  - Flag --force-pie when ET_DYN main program is not marked     as DF_1_PIE

  - Better compatibility with varying layout of address     space on Linux

  - Support for 4 PT_LOAD layout in ELF generated by     binutils-2.31

  - bug fixes, particularly better diagnosis of malformed     input

  - bug fixes - see https://github.com/upx/upx/milestone/4

ID	Name	Product	Family	Severity
258625	Linux Distros Unpatched Vulnerability : CVE-2019-20053	Nessus	Misc.	medium
427011	Alpine: multiple upx packages: security update to 3.96-r0	Tenable Cloud Security	Alpine Linux Local Security Checks	high
427011	Alpine: multiple upx packages: security update to 3.96-r0	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	high
133490	openSUSE Security Update : upx (openSUSE-2020-163)	Nessus	SuSE Local Security Checks	high

Detections

Analytics

CVE-2019-20053

medium

Tenable Plugins

medium

high

high

high