CVE-2015-8844

The signal implementation in the Linux kernel before 4.3.5 on powerpc platforms does not check for an MSR with both the S and T bits set, which allows local users to cause a denial of service (TM Bad Thing exception and panic) via a crafted application.

CVSS v3.0 5.5 MEDIUM
CVSS v2.0 4.7 MEDIUM

5.5^/10

CVSS v3.0 : MEDIUM

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

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

4.7^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 3.4 / Impact : 6.9

Access Vector LOCAL

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact COMPLETE

References

Link	Resource
http://www.openwall.com/lists/oss-security/2016/04/13/1
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d2b9d2a5ad5ef04ff978c9923d19730cb05efd55	Vendor Advisory
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.3.5
https://bugzilla.redhat.com/show_bug.cgi?id=1326540
https://github.com/torvalds/linux/commit/d2b9d2a5ad5ef04ff978c9923d19730cb05efd55
http://www.securitytracker.com/id/1035594
http://rhn.redhat.com/errata/RHSA-2016-2584.html
http://rhn.redhat.com/errata/RHSA-2016-2574.html

Advertisement

Configurations

Configuration 1 (hide)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Information

Published : 2016-04-27 10:59

Updated : 2018-01-04 18:30

NVD link : CVE-2015-8844

Mitre link : CVE-2015-8844

JSON object : View

CWE

CWE-20

Improper Input Validation

Advertisement

Products Affected

linux

linux_kernel

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "http://www.openwall.com/lists/oss-security/2016/04/13/1", "name": "[oss-security] 20160413 CVE Request: Linux kernel: incorrect restoration of machine specific registers from signal handler.", "tags": [], "refsource": "MLIST"}, {"url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d2b9d2a5ad5ef04ff978c9923d19730cb05efd55", "name": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d2b9d2a5ad5ef04ff978c9923d19730cb05efd55", "tags": ["Vendor Advisory"], "refsource": "CONFIRM"}, {"url": "http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.3.5", "name": "http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.3.5", "tags": [], "refsource": "CONFIRM"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1326540", "name": "https://bugzilla.redhat.com/show_bug.cgi?id=1326540", "tags": [], "refsource": "CONFIRM"}, {"url": "https://github.com/torvalds/linux/commit/d2b9d2a5ad5ef04ff978c9923d19730cb05efd55", "name": "https://github.com/torvalds/linux/commit/d2b9d2a5ad5ef04ff978c9923d19730cb05efd55", "tags": [], "refsource": "CONFIRM"}, {"url": "http://www.securitytracker.com/id/1035594", "name": "1035594", "tags": [], "refsource": "SECTRACK"}, {"url": "http://rhn.redhat.com/errata/RHSA-2016-2584.html", "name": "RHSA-2016:2584", "tags": [], "refsource": "REDHAT"}, {"url": "http://rhn.redhat.com/errata/RHSA-2016-2574.html", "name": "RHSA-2016:2574", "tags": [], "refsource": "REDHAT"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "The signal implementation in the Linux kernel before 4.3.5 on powerpc platforms does not check for an MSR with both the S and T bits set, which allows local users to cause a denial of service (TM Bad Thing exception and panic) via a crafted application."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-20"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2015-8844", "ASSIGNER": "cve@mitre.org"}}, "impact": {"baseMetricV2": {"cvssV2": {"version": "2.0", "baseScore": 4.7, "accessVector": "LOCAL", "vectorString": "AV:L/AC:M/Au:N/C:N/I:N/A:C", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "MEDIUM", "availabilityImpact": "COMPLETE", "confidentialityImpact": "NONE"}, "severity": "MEDIUM", "impactScore": 6.9, "obtainAllPrivilege": false, "exploitabilityScore": 3.4, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": true}, "baseMetricV3": {"cvssV3": {"scope": "UNCHANGED", "version": "3.0", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.0/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": "2016-04-27T17:59Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndIncluding": "4.3.4"}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2018-01-05T02:30Z"}