CVE-2021-29488

SABnzbd is an open source binary newsreader. A vulnerability was discovered in SABnzbd that could trick the `filesystem.renamer()` function into writing downloaded files outside the configured Download Folder via malicious PAR2 files. A patch was released as part of SABnzbd 3.2.1RC1. As a workaround, limit downloads to NZBs without PAR2 files, deny write permissions to the SABnzbd process outside areas it must access to perform its job, or update to a fixed version.

CVSS v3 5.3 MEDIUM
CVSS v2.0 5.0 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:N/C:N/I:P/A:N

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

References

Link	Resource
https://github.com/sabnzbd/sabnzbd/security/advisories/GHSA-jwj3-wrvf-v3rp	Patch Third Party Advisory

Configurations

Configuration 1 (hide)

AND

cpe:2.3:a:sabnzbd:sabnzbd:*:*:*:*:*:*:*:*

cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*

Configuration 2 (hide)

AND

cpe:2.3:a:sabnzbd:sabnzbd:*:*:*:*:*:*:*:*

OR	cpe:2.3:o:apple:macos:-:::::::*
	cpe:2.3:o:linux:linux_kernel:-:::::::*

History

19 May 2021, 18:56

Type	Values Removed	Values Added
CPE		cpe:2.3:a:sabnzbd:sabnzbd:::::::: cpe:2.3:o:microsoft:windows:-:::::::* cpe:2.3:o:linux:linux_kernel:-:::::::* cpe:2.3:o:apple:macos:-:::::::*
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : 5.0 v3 : 5.3
References	~~(CONFIRM) https://github.com/sabnzbd/sabnzbd/security/advisories/GHSA-jwj3-wrvf-v3rp -~~	(CONFIRM) https://github.com/sabnzbd/sabnzbd/security/advisories/GHSA-jwj3-wrvf-v3rp - Patch, Third Party Advisory

07 May 2021, 18:30

Type	Values Removed	Values Added
CWE		CWE-23

07 May 2021, 15:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2021-05-07 15:15

Updated : 2023-12-10 13:55

NVD link : CVE-2021-29488

Mitre link : CVE-2021-29488

CVE.ORG link : CVE-2021-29488

JSON object : View

Products Affected

microsoft

windows

sabnzbd

sabnzbd

linux

linux_kernel

apple

macos

CWE

CWE-23

Relative Path Traversal

{"id": "CVE-2021-29488", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 5.0, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "LOW", "availabilityImpact": "NONE", "confidentialityImpact": "NONE"}, "acInsufInfo": false, "impactScore": 2.9, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 1.4, "exploitabilityScore": 3.9}, {"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 1.4, "exploitabilityScore": 2.8}]}, "published": "2021-05-07T15:15:07.503", "references": [{"url": "https://github.com/sabnzbd/sabnzbd/security/advisories/GHSA-jwj3-wrvf-v3rp", "tags": ["Patch", "Third Party Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-23"}]}], "descriptions": [{"lang": "en", "value": "SABnzbd is an open source binary newsreader. A vulnerability was discovered in SABnzbd that could trick the `filesystem.renamer()` function into writing downloaded files outside the configured Download Folder via malicious PAR2 files. A patch was released as part of SABnzbd 3.2.1RC1. As a workaround, limit downloads to NZBs without PAR2 files, deny write permissions to the SABnzbd process outside areas it must access to perform its job, or update to a fixed version."}, {"lang": "es", "value": "SABnzbd es un lector de noticias binario de c\u00f3digo abierto. Se detect\u00f3 una vulnerabilidad en SABnzbd que podr\u00eda enga\u00f1ar a la funci\u00f3n \"filesystem.renamer()\" para escribir archivos descargados fuera de la carpeta de descarga configurada por medio de archivos PAR2 maliciosos. Un parche se lanz\u00f3 como parte de SABnzbd versi\u00f3n 3.2.1RC1. Como soluci\u00f3n alternativa, el l\u00edmite descargas a los NZB sin archivos PAR2, niegue los permisos de escritura al proceso SABnzbd fuera de las \u00e1reas a las que debe acceder para llevar a cabo su trabajo o actualizar a una versi\u00f3n fija"}], "lastModified": "2021-05-19T18:56:11.047", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:sabnzbd:sabnzbd:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F7ED84A5-0124-4D49-8B3D-F4BE86572874", "versionEndExcluding": "3.0.0"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "A2572D17-1DE6-457B-99CC-64AFD54487EA"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:sabnzbd:sabnzbd:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "AF8BA62B-15E3-4984-85E6-9F2097D325A6", "versionEndExcluding": "3.2.1"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "387021A0-AF36-463C-A605-32EA7DAC172E"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "703AF700-7A70-47E2-BC3A-7FD03B3CA9C1"}], "operator": "OR"}], "operator": "AND"}], "sourceIdentifier": "security-advisories@github.com"}