CVE-2017-16943

The receive_msg function in receive.c in the SMTP daemon in Exim 4.88 and 4.89 allows remote attackers to execute arbitrary code or cause a denial of service (use-after-free) via vectors involving BDAT commands.

CVSS v3.0 9.8 CRITICAL
CVSS v2.0 7.5 HIGH

9.8^/10

CVSS v3.0 : CRITICAL

V3 Legend

Vector : AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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

V2 Legend

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
https://git.exim.org/exim.git/commitdiff/4e6ae6235c68de243b1c2419027472d7659aa2b4	Patch
https://bugs.exim.org/show_bug.cgi?id=2199	Exploit Issue Tracking
https://lists.exim.org/lurker/message/20171125.034842.d1d75cac.en.html	Mailing List
https://github.com/LetUsFsck/PoC-Exploit-Mirror/tree/master/CVE-2017-16944	Exploit
https://git.exim.org/exim.git/commit/4090d62a4b25782129cc1643596dc2f6e8f63bde	Patch
http://openwall.com/lists/oss-security/2017/11/25/3	Mailing List
http://openwall.com/lists/oss-security/2017/11/25/2	Mailing List
http://openwall.com/lists/oss-security/2017/11/25/1	Mailing List
http://www.securitytracker.com/id/1039872	Third Party Advisory VDB Entry
https://www.debian.org/security/2017/dsa-4053	Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/05/04/7

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:exim:exim:4.89:-::::::
	cpe:2.3:a:exim:exim:4.88:-::::::

Configuration 2 (hide)

cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

Information

Published : 2017-11-25 09:29

Updated : 2021-05-04 11:15

NVD link : CVE-2017-16943

Mitre link : CVE-2017-16943

JSON object : View

CWE

CWE-416

Use After Free

Products Affected

debian

debian_linux

exim

exim

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://git.exim.org/exim.git/commitdiff/4e6ae6235c68de243b1c2419027472d7659aa2b4", "name": "https://git.exim.org/exim.git/commitdiff/4e6ae6235c68de243b1c2419027472d7659aa2b4", "tags": ["Patch"], "refsource": "MISC"}, {"url": "https://bugs.exim.org/show_bug.cgi?id=2199", "name": "https://bugs.exim.org/show_bug.cgi?id=2199", "tags": ["Exploit", "Issue Tracking"], "refsource": "MISC"}, {"url": "https://lists.exim.org/lurker/message/20171125.034842.d1d75cac.en.html", "name": "https://lists.exim.org/lurker/message/20171125.034842.d1d75cac.en.html", "tags": ["Mailing List"], "refsource": "MISC"}, {"url": "https://github.com/LetUsFsck/PoC-Exploit-Mirror/tree/master/CVE-2017-16944", "name": "https://github.com/LetUsFsck/PoC-Exploit-Mirror/tree/master/CVE-2017-16944", "tags": ["Exploit"], "refsource": "MISC"}, {"url": "https://git.exim.org/exim.git/commit/4090d62a4b25782129cc1643596dc2f6e8f63bde", "name": "https://git.exim.org/exim.git/commit/4090d62a4b25782129cc1643596dc2f6e8f63bde", "tags": ["Patch"], "refsource": "MISC"}, {"url": "http://openwall.com/lists/oss-security/2017/11/25/3", "name": "http://openwall.com/lists/oss-security/2017/11/25/3", "tags": ["Mailing List"], "refsource": "MISC"}, {"url": "http://openwall.com/lists/oss-security/2017/11/25/2", "name": "http://openwall.com/lists/oss-security/2017/11/25/2", "tags": ["Mailing List"], "refsource": "MISC"}, {"url": "http://openwall.com/lists/oss-security/2017/11/25/1", "name": "http://openwall.com/lists/oss-security/2017/11/25/1", "tags": ["Mailing List"], "refsource": "MISC"}, {"url": "http://www.securitytracker.com/id/1039872", "name": "1039872", "tags": ["Third Party Advisory", "VDB Entry"], "refsource": "SECTRACK"}, {"url": "https://www.debian.org/security/2017/dsa-4053", "name": "DSA-4053", "tags": ["Third Party Advisory"], "refsource": "DEBIAN"}, {"url": "http://www.openwall.com/lists/oss-security/2021/05/04/7", "name": "[oss-security] 20210504 21Nails: Multiple vulnerabilities in Exim", "tags": [], "refsource": "MLIST"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "The receive_msg function in receive.c in the SMTP daemon in Exim 4.88 and 4.89 allows remote attackers to execute arbitrary code or cause a denial of service (use-after-free) via vectors involving BDAT commands."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-416"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2017-16943", "ASSIGNER": "cve@mitre.org"}}, "impact": {"baseMetricV2": {"cvssV2": {"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"}, "severity": "HIGH", "impactScore": 6.4, "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}, "baseMetricV3": {"cvssV3": {"scope": "UNCHANGED", "version": "3.0", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.0/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}}, "publishedDate": "2017-11-25T17:29Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:exim:exim:4.89:-:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:a:exim:exim:4.88:-:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2021-05-04T18:15Z"}

9.8 /10