CVE-2020-27790

A floating point exception issue was discovered in UPX in PackLinuxElf64::invert_pt_dynamic() function of p_lx_elf.cpp file. An attacker with a crafted input file could trigger this issue that could cause a crash leading to a denial of service. The highest impact is to Availability.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/upx/upx/commit/eb90eab6325d009004ffb155e3e33f22d4d3ca26	Patch Third Party Advisory
https://github.com/upx/upx/issues/331	Exploit Issue Tracking Patch Third Party Advisory
https://github.com/upx/upx/commit/eb90eab6325d009004ffb155e3e33f22d4d3ca26	Patch Third Party Advisory
https://github.com/upx/upx/issues/331	Exploit Issue Tracking Patch Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:upx:upx:*:*:*:*:*:*:*:*

History

11 Apr 2025, 12:27

Type	Values Removed	Values Added
First Time		Upx upx Upx
CPE	cpe:2.3:a:upx_project:upx::::::::	cpe:2.3:a:upx:upx::::::::

21 Nov 2024, 05:21

Type	Values Removed	Values Added
References	~~() https://github.com/upx/upx/commit/eb90eab6325d009004ffb155e3e33f22d4d3ca26 - Patch, Third Party Advisory~~	() https://github.com/upx/upx/commit/eb90eab6325d009004ffb155e3e33f22d4d3ca26 - Patch, Third Party Advisory
References	~~() https://github.com/upx/upx/issues/331 - Exploit, Issue Tracking, Patch, Third Party Advisory~~	() https://github.com/upx/upx/issues/331 - Exploit, Issue Tracking, Patch, Third Party Advisory

23 Aug 2022, 14:55

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 5.5
CWE		CWE-369
CPE		cpe:2.3:a:upx_project:upx::::::::
References	~~(MISC) https://github.com/upx/upx/issues/331 -~~	(MISC) https://github.com/upx/upx/issues/331 - Exploit, Issue Tracking, Patch, Third Party Advisory
References	~~(MISC) https://github.com/upx/upx/commit/eb90eab6325d009004ffb155e3e33f22d4d3ca26 -~~	(MISC) https://github.com/upx/upx/commit/eb90eab6325d009004ffb155e3e33f22d4d3ca26 - Patch, Third Party Advisory

18 Aug 2022, 19:19

Type	Values Removed	Values Added
New CVE

Information

Published : 2022-08-18 19:15

Updated : 2025-04-11 12:27

NVD link : CVE-2020-27790

Mitre link : CVE-2020-27790

CVE.ORG link : CVE-2020-27790

JSON object : View

Products Affected

upx

CWE

CWE-369

Divide By Zero

{"id": "CVE-2020-27790", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "published": "2022-08-18T19:15:14.270", "references": [{"url": "https://github.com/upx/upx/commit/eb90eab6325d009004ffb155e3e33f22d4d3ca26", "tags": ["Patch", "Third Party Advisory"], "source": "secalert@redhat.com"}, {"url": "https://github.com/upx/upx/issues/331", "tags": ["Exploit", "Issue Tracking", "Patch", "Third Party Advisory"], "source": "secalert@redhat.com"}, {"url": "https://github.com/upx/upx/commit/eb90eab6325d009004ffb155e3e33f22d4d3ca26", "tags": ["Patch", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://github.com/upx/upx/issues/331", "tags": ["Exploit", "Issue Tracking", "Patch", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "secalert@redhat.com", "description": [{"lang": "en", "value": "CWE-369"}]}, {"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-369"}]}], "descriptions": [{"lang": "en", "value": "A floating point exception issue was discovered in UPX in PackLinuxElf64::invert_pt_dynamic() function of p_lx_elf.cpp file. An attacker with a crafted input file could trigger this issue that could cause a crash leading to a denial of service. The highest impact is to Availability."}, {"lang": "es", "value": "Se ha detectado un problema de excepci\u00f3n de punto flotante en UPX en la funci\u00f3n PackLinuxElf64::invert_pt_dynamic() del archivo p_lx_elf.cpp. Un atacante con un archivo de entrada dise\u00f1ado podr\u00eda desencadenar este problema que podr\u00eda causar un fallo que conlleva una denegaci\u00f3n de servicio. El mayor impacto es la disponibilidad."}], "lastModified": "2025-04-11T12:27:55.013", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:upx:upx:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0C4F8C52-D021-4C5C-87B1-DF4B3BAD895B", "versionEndExcluding": "3.96"}], "operator": "OR"}]}], "sourceIdentifier": "secalert@redhat.com"}

5.5 /10