Vulnerabilities > CVE-2019-20021 - Out-of-bounds Read vulnerability in multiple products

047910
CVSS 5.5 - MEDIUM
Attack vector
LOCAL
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
NONE
Integrity impact
NONE
Availability impact
HIGH
local
low complexity
upx-project
fedoraproject
CWE-125
nessus
NVD
Published: 2019-12-27
Updated: 2023-11-07

Summary

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

Vulnerable Configurations

Part Description Count
Application
Upx_Project
1
OS
Fedoraproject
2

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Overread Buffers
    An adversary attacks a target by providing input that causes an application to read beyond the boundary of a defined buffer. This typically occurs when a value influencing where to start or stop reading is set to reflect positions outside of the valid memory location of the buffer. This type of attack may result in exposure of sensitive information, a system crash, or arbitrary code execution.

Nessus

  • NASL familySuSE Local Security Checks
    NASL idOPENSUSE-2020-163.NASL
    descriptionThis 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
    last seen2020-06-01
    modified2020-06-02
    plugin id133490
    published2020-02-05
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/133490
    titleopenSUSE Security Update : upx (openSUSE-2020-163)
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2020-20CF0743F5.NASL
    description3.96, multiple security fixes. ---- Patch for CVE-2019-20021 Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-01
    modified2020-06-02
    plugin id133423
    published2020-02-03
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/133423
    titleFedora 30 : upx (2020-20cf0743f5)
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2020-67590FBF08.NASL
    description3.96, multiple security fixes. ---- Patch for CVE-2019-20021 Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-01
    modified2020-06-02
    plugin id133535
    published2020-02-07
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/133535
    titleFedora 31 : upx (2020-67590fbf08)

References