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amazonAmazonALAS-2017-844
HistoryJun 19, 2017 - 8:51 a.m.

Critical: glibc

2017-06-1908:51:00
alas.aws.amazon.com
24

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

7.2 High

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

0.001 Low

EPSS

Percentile

25.7%

Issue Overview:

Glibc contains a vulnerability that allows specially crafted LD_LIBRARY_PATH values to manipulate the heap/stack, causing them to alias, potentially resulting in arbitrary code execution. Please note that additional hardening changes have been made to glibc to prevent manipulation of stack and heap memory but these issues are not directly exploitable, as such they have not been given a CVE. This affects glibc 2.25 and earlier. (CVE-2017-1000366)

Affected Packages:

glibc

Issue Correction:
Run yum update glibc to update your system.

New Packages:

i686:  
    glibc-common-2.17-157.170.amzn1.i686  
    glibc-static-2.17-157.170.amzn1.i686  
    glibc-devel-2.17-157.170.amzn1.i686  
    glibc-debuginfo-2.17-157.170.amzn1.i686  
    glibc-utils-2.17-157.170.amzn1.i686  
    glibc-headers-2.17-157.170.amzn1.i686  
    glibc-2.17-157.170.amzn1.i686  
    glibc-debuginfo-common-2.17-157.170.amzn1.i686  
    nscd-2.17-157.170.amzn1.i686  
  
src:  
    glibc-2.17-157.170.amzn1.src  
  
x86_64:  
    glibc-utils-2.17-157.170.amzn1.x86_64  
    glibc-common-2.17-157.170.amzn1.x86_64  
    glibc-headers-2.17-157.170.amzn1.x86_64  
    nscd-2.17-157.170.amzn1.x86_64  
    glibc-debuginfo-2.17-157.170.amzn1.x86_64  
    glibc-devel-2.17-157.170.amzn1.x86_64  
    glibc-2.17-157.170.amzn1.x86_64  
    glibc-debuginfo-common-2.17-157.170.amzn1.x86_64  
    glibc-static-2.17-157.170.amzn1.x86_64  

Additional References

Red Hat: CVE-2017-1000366

Mitre: CVE-2017-1000366

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

7.2 High

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

0.001 Low

EPSS

Percentile

25.7%