National Vulnerability Database

National Vulnerability Database

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    Vulnerabilities Detail

CVE-2019-11191 Detail

Current Description

** 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.

Source:  MITRE
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 2.5 LOW
Vector: AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N (V3.0 legend)
Impact Score: 1.4
Exploitability Score: 1.0

Attack Vector (AV): Local
Attack Complexity (AC): High
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): Low
Integrity (I): None
Availability (A): None

CVSS v2.0 Severity and Metrics:

Base Score: 1.9 LOW
Vector: (AV:L/AC:M/Au:N/C:P/I:N/A:N) (V2 legend)
Impact Subscore: 2.9
Exploitability Subscore: 3.4

Access Vector (AV): Local
Access Complexity (AC): Medium
Authentication (AU): None
Confidentiality (C): Partial
Integrity (I): None
Availability (A): None
Additional Information:
Allows unauthorized disclosure of information

References to Advisories, Solutions, and Tools

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

Technical Details

Vulnerability Type (View All)

  • Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') (CWE-362)

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (including)
5.0.7


Change History

9 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2019-11191
NVD Published Date:
04/11/2019
NVD Last Modified:
06/17/2019