CVE-2017-1000366

Impact:
Important
Public Date:
2017-06-19
Bugzilla:
1452543: CVE-2017-1000366 glibc: heap/stack gap jumping via unbounded stack allocations
A flaw was found in the way memory was being allocated on the stack for user space binaries. If heap (or different memory region) and stack memory regions were adjacent to each other, an attacker could use this flaw to jump over the stack guard gap, cause controlled memory corruption on process stack or the adjacent memory region, and thus increase their privileges on the system. This is glibc-side mitigation which blocks processing of LD_LIBRARY_PATH for programs running in secure-execution mode and reduces the number of allocations performed by the processing of LD_AUDIT, LD_PRELOAD, and LD_HWCAP_MASK, making successful exploitation of this issue more difficult.

Find out more about CVE-2017-1000366 from the MITRE CVE dictionary dictionary and NIST NVD.

Statement

This is a glibc-side mitigation. For a related kernel mitigation please see https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-1000364 .

CVSS v2 metrics

Base Score 6.2
Base Metrics AV:L/AC:H/Au:N/C:C/I:C/A:C
Access Vector Local
Access Complexity High
Authentication None
Confidentiality Impact Complete
Integrity Impact Complete
Availability Impact Complete

CVSS v3 metrics

CVSS3 Base Score 7.4
CVSS3 Base Metrics CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity High
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity Impact High
Availability Impact High

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat Security Errata

Platform Errata Release Date
Red Hat Enterprise Linux Long Life (v. 5.9 server) (glibc) RHSA-2017:1479 2017-06-19
Red Hat Enterprise Linux Server (v. 5 ELS) (glibc) RHSA-2017:1479 2017-06-19
Red Hat Enterprise Linux Server TUS (v. 6.6) (glibc) RHSA-2017:1479 2017-06-19
Red Hat Enterprise Linux Server TUS (v. 6.5) (glibc) RHSA-2017:1479 2017-06-19
Red Hat Container Development Kit 3.0 RHSA-2017:1567 2017-06-21
Red Hat Enterprise Linux Advanced Update Support 6.6 (glibc) RHSA-2017:1479 2017-06-19
Red Hat Enterprise Linux 7 (glibc) RHSA-2017:1481 2017-06-19
Red Hat Enterprise Linux Extended Update Support 6.7 (glibc) RHSA-2017:1479 2017-06-19
Red Hat Enterprise Linux Advanced Update Support 6.4 (glibc) RHSA-2017:1479 2017-06-19
Red Hat Enterprise Linux 6 (glibc) RHSA-2017:1480 2017-06-19
Red Hat Enterprise Linux Advanced Update Support 6.2 (glibc) RHSA-2017:1479 2017-06-19
Red Hat Enterprise Linux Advanced Update Support 6.5 (glibc) RHSA-2017:1479 2017-06-19
Red Hat Enterprise Linux Extended Update Support 7.2 (glibc) RHSA-2017:1479 2017-06-19

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 4 glibc Will not fix

Acknowledgements

Red Hat would like to thank Qualys Research Labs for reporting this issue.

External References

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