CVE-2016-4557

The replace_map_fd_with_map_ptr function in kernel/bpf/verifier.c in the Linux kernel before 4.5.5 does not properly maintain an fd data structure, which allows local users to gain privileges or cause a denial of service (use-after-free) via crafted BPF instructions that reference an incorrect file descriptor.

CVSS v3.0 7.8 HIGH
CVSS v2.0 7.2 HIGH

7.8^/10

CVSS v3.0 : HIGH

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

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

7.2^/10

CVSS v2.0 : HIGH

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

Exploitability : 3.9 / Impact : 10.0

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8358b02bf67d3a5d8a825070e1aa73f25fb2e4c7
https://bugzilla.redhat.com/show_bug.cgi?id=1334307
https://github.com/torvalds/linux/commit/8358b02bf67d3a5d8a825070e1aa73f25fb2e4c7	Vendor Advisory
https://bugs.chromium.org/p/project-zero/issues/detail?id=808
https://bugs.debian.org/823603
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.5
http://www.openwall.com/lists/oss-security/2016/05/06/4
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00044.html
https://www.exploit-db.com/exploits/40759/

Configurations

Configuration 1 (hide)

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

Information

Published : 2016-05-23 10:59

Updated : 2017-09-03 01:29

NVD link : CVE-2016-4557

Mitre link : CVE-2016-4557

JSON object : View

Products Affected

linux

linux_kernel

CWE

NVD-CWE-Other

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8358b02bf67d3a5d8a825070e1aa73f25fb2e4c7", "name": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8358b02bf67d3a5d8a825070e1aa73f25fb2e4c7", "tags": [], "refsource": "CONFIRM"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1334307", "name": "https://bugzilla.redhat.com/show_bug.cgi?id=1334307", "tags": [], "refsource": "CONFIRM"}, {"url": "https://github.com/torvalds/linux/commit/8358b02bf67d3a5d8a825070e1aa73f25fb2e4c7", "name": "https://github.com/torvalds/linux/commit/8358b02bf67d3a5d8a825070e1aa73f25fb2e4c7", "tags": ["Vendor Advisory"], "refsource": "CONFIRM"}, {"url": "https://bugs.chromium.org/p/project-zero/issues/detail?id=808", "name": "https://bugs.chromium.org/p/project-zero/issues/detail?id=808", "tags": [], "refsource": "MISC"}, {"url": "https://bugs.debian.org/823603", "name": "https://bugs.debian.org/823603", "tags": [], "refsource": "CONFIRM"}, {"url": "http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.5", "name": "http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.5", "tags": [], "refsource": "CONFIRM"}, {"url": "http://www.openwall.com/lists/oss-security/2016/05/06/4", "name": "[oss-security] 20160506 CVE Requests: Linux: BPF flaws (one use-after-free / local root privilege escalation)", "tags": [], "refsource": "MLIST"}, {"url": "http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00044.html", "name": "openSUSE-SU-2016:1641", "tags": [], "refsource": "SUSE"}, {"url": "https://www.exploit-db.com/exploits/40759/", "name": "40759", "tags": [], "refsource": "EXPLOIT-DB"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "The replace_map_fd_with_map_ptr function in kernel/bpf/verifier.c in the Linux kernel before 4.5.5 does not properly maintain an fd data structure, which allows local users to gain privileges or cause a denial of service (use-after-free) via crafted BPF instructions that reference an incorrect file descriptor."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "NVD-CWE-Other"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2016-4557", "ASSIGNER": "cve@mitre.org"}}, "impact": {"baseMetricV2": {"cvssV2": {"version": "2.0", "baseScore": 7.2, "accessVector": "LOCAL", "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C", "authentication": "NONE", "integrityImpact": "COMPLETE", "accessComplexity": "LOW", "availabilityImpact": "COMPLETE", "confidentialityImpact": "COMPLETE"}, "severity": "HIGH", "impactScore": 10.0, "obtainAllPrivilege": false, "exploitabilityScore": 3.9, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}, "baseMetricV3": {"cvssV3": {"scope": "UNCHANGED", "version": "3.0", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}}, "publishedDate": "2016-05-23T10:59Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndIncluding": "4.5.4"}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2017-09-03T01:29Z"}