CVE-2019-11191

** DISPUTED ** The Linux kernel through 5.0.7, when CONFIG_IA32_AOUT is enabled and ia32_aout is loaded, allows local users to bypass ASLR on setuid a.out programs (if any exist) because install_exec_creds() is called too late in load_aout_binary() in fs/binfmt_aout.c, and thus the ptrace_may_access() check has a race condition when reading /proc/pid/stat. NOTE: the software maintainer disputes that this is a vulnerability because ASLR for a.out format executables has never been supported.

CVSS v3.0 2.5 LOW
CVSS v2.0 1.9 LOW

2.5^/10

CVSS v3.0 : LOW

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

Exploitability : 1.0 / Impact : 1.4

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

1.9^/10

CVSS v2.0 : LOW

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

Exploitability : 3.4 / Impact : 2.9

Access Vector LOCAL

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

References

Link	Resource
https://www.openwall.com/lists/oss-security/2019/04/03/4/1	Mailing List Exploit Third Party Advisory
https://www.openwall.com/lists/oss-security/2019/04/03/4	Mailing List Exploit Third Party Advisory
http://www.securityfocus.com/bid/107887	Third Party Advisory VDB Entry
http://www.openwall.com/lists/oss-security/2019/04/18/5	Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2019/05/22/7
https://usn.ubuntu.com/4008-1/
https://usn.ubuntu.com/4007-2/
https://usn.ubuntu.com/4007-1/
https://usn.ubuntu.com/4006-2/
https://usn.ubuntu.com/4006-1/
https://usn.ubuntu.com/4008-3/
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00039.html

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Configurations

Configuration 1 (hide)

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

Information

Published : 2019-04-11 17:29

Updated : 2019-06-17 09:15

NVD link : CVE-2019-11191

Mitre link : CVE-2019-11191

JSON object : View

CWE

CWE-362

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

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Products Affected

linux

linux_kernel

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