A heap-based buffer over-read was discovered in the get_le32 function in bele.h in UPX 4.0.0 via a crafted Mach-O file.

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

  - Null pointer dereference was found in upx PackLinuxElf::canUnpack() in p_lx_elf.cpp,in version UPX 4.0.0.
    That allow attackers to execute arbitrary code and cause a denial of service via a crafted file.
    (CVE-2021-30500)

  - A heap buffer overflow read was discovered in upx 4.0.0, because the check in p_lx_elf.cpp is not perfect.
    (CVE-2020-24119)

  - A heap-based buffer over-read was discovered in the invert_pt_dynamic function in p_lx_elf.cpp in UPX
    4.0.0 via a crafted Mach-O file. (CVE-2020-27796)

  - An invalid memory address reference was discovered in the elf_lookup function in p_lx_elf.cpp in UPX 4.0.0
    via a crafted Mach-O file. (CVE-2020-27797)

  - An invalid memory address reference was discovered in the adjABS function in p_lx_elf.cpp in UPX 4.0.0 via
    a crafted Mach-O file. (CVE-2020-27798)

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

  - A heap-based buffer over-read was discovered in the get_le32 function in bele.h in UPX 4.0.0 via a crafted     Mach-O file. (CVE-2020-27800)

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

ID	Name	Product	Family	Severity
427474	Alpine: multiple upx packages: security update to 4.0.0-r0	Tenable Cloud Security	Alpine Linux Local Security Checks	high
427474	Alpine: multiple upx packages: security update to 4.0.0-r0	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	high
223566	Linux Distros Unpatched Vulnerability : CVE-2020-27800	Nessus	Misc.	high

Detections

Analytics

CVE-2020-27800

high

Tenable Plugins

high

high

high