CVE-2013-4548

The mm_newkeys_from_blob function in monitor_wrap.c in sshd in OpenSSH 6.2 and 6.3, when an AES-GCM cipher is used, does not properly initialize memory for a MAC context data structure, which allows remote authenticated users to bypass intended ForceCommand and login-shell restrictions via packet data that provides a crafted callback address.

CVSS v2.0 6.0 MEDIUM

6.0^/10

CVSS v2.0 : MEDIUM

V2 Legend

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

Exploitability : 6.8 / Impact : 6.4

Access Vector NETWORK

Access Complexity MEDIUM

Authentication SINGLE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
http://www.openssh.com/txt/gcmrekey.adv	Vendor Advisory
http://openwall.com/lists/oss-security/2013/11/08/3
http://www.ubuntu.com/usn/USN-2014-1
http://lists.opensuse.org/opensuse-security-announce/2013-11/msg00017.html
http://marc.info/?l=bugtraq&m=141576985122836&w=2

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:openbsd:openssh:6.3:::::::*
	cpe:2.3:a:openbsd:openssh:6.2:::::::*

Information

Published : 2013-11-08 07:55

Updated : 2019-10-09 16:08

NVD link : CVE-2013-4548

Mitre link : CVE-2013-4548

JSON object : View

CWE

CWE-264

Permissions, Privileges, and Access Controls

Products Affected

openbsd

openssh

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "http://www.openssh.com/txt/gcmrekey.adv", "name": "http://www.openssh.com/txt/gcmrekey.adv", "tags": ["Vendor Advisory"], "refsource": "CONFIRM"}, {"url": "http://openwall.com/lists/oss-security/2013/11/08/3", "name": "[oss-security] 20131107 Re: CVE Request - OpenSSH", "tags": [], "refsource": "MLIST"}, {"url": "http://www.ubuntu.com/usn/USN-2014-1", "name": "USN-2014-1", "tags": [], "refsource": "UBUNTU"}, {"url": "http://lists.opensuse.org/opensuse-security-announce/2013-11/msg00017.html", "name": "openSUSE-SU-2013:1726", "tags": [], "refsource": "SUSE"}, {"url": "http://marc.info/?l=bugtraq&m=141576985122836&w=2", "name": "SSRT101487", "tags": [], "refsource": "HP"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "The mm_newkeys_from_blob function in monitor_wrap.c in sshd in OpenSSH 6.2 and 6.3, when an AES-GCM cipher is used, does not properly initialize memory for a MAC context data structure, which allows remote authenticated users to bypass intended ForceCommand and login-shell restrictions via packet data that provides a crafted callback address."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-264"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2013-4548", "ASSIGNER": "secalert@redhat.com"}}, "impact": {"baseMetricV2": {"cvssV2": {"version": "2.0", "baseScore": 6.0, "accessVector": "NETWORK", "vectorString": "AV:N/AC:M/Au:S/C:P/I:P/A:P", "authentication": "SINGLE", "integrityImpact": "PARTIAL", "accessComplexity": "MEDIUM", "availabilityImpact": "PARTIAL", "confidentialityImpact": "PARTIAL"}, "severity": "MEDIUM", "impactScore": 6.4, "obtainAllPrivilege": false, "exploitabilityScore": 6.8, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}}, "publishedDate": "2013-11-08T15:55Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:openbsd:openssh:6.3:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:a:openbsd:openssh:6.2:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2019-10-09T23:08Z"}

6.0 /10