CVE-2020-28018

Exim 4 before 4.94.2 allows Use After Free in smtp_reset in certain situations that may be common for builds with OpenSSL.

CVSS v3 9.8 CRITICAL
CVSS v2.0 7.5 HIGH

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

7.5^/10

CVSS v2.0 : HIGH

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

Exploitability : 10.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
http://www.openwall.com/lists/oss-security/2021/05/11/14	Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/05/11/15	Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/05/11/17	Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/05/11/5	Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/05/11/6	Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/05/12/2	Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/05/12/3	Mailing List Third Party Advisory
https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28018-OCORK.txt	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:exim:exim:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2021-05-06 13:15

Updated : 2024-02-28 18:28

NVD link : CVE-2020-28018

Mitre link : CVE-2020-28018

CVE.ORG link : CVE-2020-28018

JSON object : View

Products Affected

exim

exim

CWE

CWE-416

Use After Free

{"id": "CVE-2020-28018", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 7.5, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "PARTIAL"}, "acInsufInfo": false, "impactScore": 6.4, "baseSeverity": "HIGH", "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": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}]}, "published": "2021-05-06T13:15:09.560", "references": [{"url": "http://www.openwall.com/lists/oss-security/2021/05/11/14", "tags": ["Mailing List", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "http://www.openwall.com/lists/oss-security/2021/05/11/15", "tags": ["Mailing List", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "http://www.openwall.com/lists/oss-security/2021/05/11/17", "tags": ["Mailing List", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "http://www.openwall.com/lists/oss-security/2021/05/11/5", "tags": ["Mailing List", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "http://www.openwall.com/lists/oss-security/2021/05/11/6", "tags": ["Mailing List", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "http://www.openwall.com/lists/oss-security/2021/05/12/2", "tags": ["Mailing List", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "http://www.openwall.com/lists/oss-security/2021/05/12/3", "tags": ["Mailing List", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28018-OCORK.txt", "tags": ["Vendor Advisory"], "source": "cve@mitre.org"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-416"}]}], "descriptions": [{"lang": "en", "value": "Exim 4 before 4.94.2 allows Use After Free in smtp_reset in certain situations that may be common for builds with OpenSSL."}, {"lang": "es", "value": "Exim 4 versiones anteriores a 4.94.2, permite un Uso de la Memoria Previamente Liberada en la funci\u00f3n smtp_reset en determinadas situaciones que pueden ser comunes para unas compilaciones con OpenSSL"}], "lastModified": "2021-05-26T19:34:57.437", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:exim:exim:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E841C3DD-AD28-4335-815A-E094516E50B8", "versionEndExcluding": "4.94.2", "versionStartIncluding": "4.90"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org"}