CVE-2019-20051
A floating-point exception was discovered in PackLinuxElf::elf_hash in p_lx_elf.cpp in UPX 3.95....
A floating-point exception was discovered in PackLinuxElf::elf_hash in p_lx_elf.cpp in UPX 3.95. The vulnerability causes an application crash, which leads to denial of service.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
A floating-point exception was discovered in PackLinuxElf::elf_hash in p_lx_elf.cpp in UPX 3.95. The vulnerability causes an application crash, which leads to denial of service.
- Record
CVE-2019-20051- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:N/A:P - Weakness
- CWE-682
- Updated
- 2026-11-02
CVE List No score
A floating-point exception was discovered in PackLinuxElf::elf_hash in p_lx_elf.cpp in UPX 3.95. The vulnerability causes an application crash, which leads to denial of service.
- Record
CVE-2019-20051- Updated
- 2026-11-02
EUVDEUVD-2019-10607 No score
A floating-point exception was discovered in PackLinuxElf::elf_hash in p_lx_elf.cpp in UPX 3.95. The vulnerability causes an application crash, which leads to denial of service.
- Record
EUVD-2019-10607- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-4pmq-77vh-vh7v
A floating-point exception was discovered in PackLinuxElf::elf_hash in p_lx_elf.cpp in UPX 3.95....
A floating-point exception was discovered in PackLinuxElf::elf_hash in p_lx_elf.cpp in UPX 3.95. The vulnerability causes an application crash, which leads to denial of service.
- Record
GHSA-4pmq-77vh-vh7v- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Weakness
- CWE-682
- Updated
- 2026-11-02
OSV
A floating-point exception was discovered in PackLinuxElf::elf_hash in p_lx_elf.cpp in UPX 3.95. The vulnerability causes an application crash, which leads to denial of service.
- Record
CVE-2019-20051- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVDEBIAN-CVE-2019-20051
A floating-point exception was discovered in PackLinuxElf::elf_hash in p_lx_elf.cpp in UPX 3.95. The vulnerability causes an application crash, which leads to denial of service.
- Record
DEBIAN-CVE-2019-20051- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2019-20051
A floating-point exception was discovered in PackLinuxElf::elf_hash in p_lx_elf.cpp in UPX 3.95. The vulnerability causes an application crash, which leads to denial of service.
- Record
UBUNTU-CVE-2019-20051- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVMGASA-2020-0096 No score
Updated upx packages fix security vulnerabilities
The updated packages fix security vulnerabilities:
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)
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)
A floating-point exception was discovered in PackLinuxElf::elf_hash in p_lx_elf.cpp in UPX 3.95. The vulnerability causes an application crash, which leads to denial of service. (CVE-2019-20051)
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)
A denial of service in PackLinuxElf32::PackLinuxElf32help1(). (CVE-2019-1010048)
- Record
MGASA-2020-0096- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
upx-uclDebian:13 |
before 3.96-1 | 3.96-1 |
upx-uclDebian:14 |
before 3.96-1 | 3.96-1 |
upxMageia:7 From an advisory covering 5 CVEs |
before 3.96-1.mga7 | 3.96-1.mga7 |
uclMageia:7 From an advisory covering 5 CVEs |
before 1.03-16.1.mga7 | 1.03-16.1.mga7 |
upx-uclUbuntu:16.04:LTS |
All versions, plus listed versions 3.91-1 |
None known |
upx-uclUbuntu:18.04:LTS |
All versions, plus listed versions 3.94-23.94-33.94-4 |
None known |
upx-uclUbuntu:20.04:LTS |
All versions, plus listed versions 3.95-23.95-2build1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2019-20051 is a medium vulnerability (CVSS 5.5) in Upx, published December 27, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.90%, the 59th percentile. Fixed in upx-ucl 3.96-1.
References
github.com/upx/upx/issues/313
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/D7XU42G6MUQQXHWRP7DCF2JSIBOJ5GOO
nvd.nist.gov/vuln/detail/CVE-2019-20051
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security-tracker.debian.org/tracker/CVE-2019-20051
advisories.mageia.org/MGASA-2020-0096.html
bugs.mageia.org/show_bug.cgi?id=26172
lists.opensuse.org/opensuse-updates/2020-02/msg00012.html
ubuntu.com/security/CVE-2019-20051
cve.org/CVERecord?id=CVE-2019-20051