CVE-2021-39854

Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199 (and earlier) are affected by a Null pointer dereference vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve an application denial-of-service in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

CVSS v3.0 5.5 MEDIUM
CVSS v2.0 4.3 MEDIUM

5.5^/10

CVSS v3.0 : MEDIUM

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

4.3^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 8.6 / Impact : 2.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://helpx.adobe.com/security/products/acrobat/apsb21-55.html	Release Notes Vendor Advisory

Advertisement

Configurations

Configuration 1 (hide)

AND

cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:continuous:*:*:*

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

Configuration 2 (hide)

AND

cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:continuous:*:*:*

cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*

Configuration 3 (hide)

AND

cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:continuous:*:*:*

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

Configuration 4 (hide)

AND

cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:continuous:*:*:*

cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*

Configuration 5 (hide)

AND

OR	cpe:2.3:a:adobe:acrobat:::::classic:::*
	cpe:2.3:a:adobe:acrobat_reader:::::classic:::*

OR	cpe:2.3:o:apple:macos:-:::::::*
	cpe:2.3:o:microsoft:windows:-:::::::*

Configuration 6 (hide)

AND

OR	cpe:2.3:a:adobe:acrobat:::::classic:::*
	cpe:2.3:a:adobe:acrobat_reader:::::classic:::*

OR	cpe:2.3:o:apple:macos:-:::::::*
	cpe:2.3:o:microsoft:windows:-:::::::*

Information

Published : 2021-09-29 09:15

Updated : 2021-10-06 11:43

NVD link : CVE-2021-39854

Mitre link : CVE-2021-39854

JSON object : View

CWE

CWE-476

NULL Pointer Dereference

Advertisement

Products Affected

microsoft

windows

adobe

acrobat
acrobat_reader_dc
acrobat_reader
acrobat_dc

apple

macos

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://helpx.adobe.com/security/products/acrobat/apsb21-55.html", "name": "https://helpx.adobe.com/security/products/acrobat/apsb21-55.html", "tags": ["Release Notes", "Vendor Advisory"], "refsource": "MISC"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199 (and earlier) are affected by a Null pointer dereference vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve an application denial-of-service in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-476"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2021-39854", "ASSIGNER": "psirt@adobe.com"}}, "impact": {"baseMetricV2": {"cvssV2": {"version": "2.0", "baseScore": 4.3, "accessVector": "NETWORK", "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "MEDIUM", "availabilityImpact": "PARTIAL", "confidentialityImpact": "NONE"}, "severity": "MEDIUM", "acInsufInfo": false, "impactScore": 2.9, "obtainAllPrivilege": false, "exploitabilityScore": 8.6, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": true}, "baseMetricV3": {"cvssV3": {"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}}, "publishedDate": "2021-09-29T16:15Z", "configurations": {"nodes": [{"children": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:continuous:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndIncluding": "21.005.20060", "versionStartIncluding": "15.008.20082"}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}]}], "operator": "AND", "cpe_match": []}, {"children": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:continuous:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndIncluding": "21.005.20058", "versionStartIncluding": "15.008.20082"}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}]}], "operator": "AND", "cpe_match": []}, {"children": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:continuous:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndIncluding": "21.005.20060", "versionStartIncluding": "15.008.20082"}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}]}], "operator": "AND", "cpe_match": []}, {"children": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:continuous:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndIncluding": "21.005.20058", "versionStartIncluding": "15.008.20082"}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}]}], "operator": "AND", "cpe_match": []}, {"children": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:adobe:acrobat:*:*:*:*:classic:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndIncluding": "17.011.30199", "versionStartIncluding": "17.011.30059"}, {"cpe23Uri": "cpe:2.3:a:adobe:acrobat_reader:*:*:*:*:classic:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndIncluding": "17.011.30199", "versionStartIncluding": "17.011.30059"}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}]}], "operator": "AND", "cpe_match": []}, {"children": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:adobe:acrobat:*:*:*:*:classic:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndIncluding": "20.004.30006", "versionStartIncluding": "20.001.30005"}, {"cpe23Uri": "cpe:2.3:a:adobe:acrobat_reader:*:*:*:*:classic:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndIncluding": "20.004.30006", "versionStartIncluding": "20.001.30005"}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}]}], "operator": "AND", "cpe_match": []}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2021-10-06T18:43Z"}