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amazonAmazonALAS-2017-892
HistorySep 13, 2017 - 10:50 p.m.

Important: httpd

2017-09-1322:50:00
alas.aws.amazon.com
30

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

7.5 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

0.468 Medium

EPSS

Percentile

97.4%

Issue Overview:

A NULL pointer dereference flaw was found in the httpd’s mod_ssl module. A remote attacker could use this flaw to cause an httpd child process to crash if another module used by httpd called a certain API function during the processing of an HTTPS request. (CVE-2017-3169)

It was discovered that the use of httpd’s ap_get_basic_auth_pw() API function outside of the authentication phase could lead to authentication bypass. A remote attacker could possibly use this flaw to bypass required authentication if the API was used incorrectly by one of the modules used by httpd. (CVE-2017-3167)

A buffer over-read flaw was found in the httpd’s mod_mime module. A user permitted to modify httpd’s MIME configuration could use this flaw to cause httpd child process to crash. (CVE-2017-7679)

It was discovered that the httpd’s mod_auth_digest module did not properly initialize memory before using it when processing certain headers related to digest authentication. A remote attacker could possibly use this flaw to disclose potentially sensitive information or cause httpd child process to crash by sending specially crafted requests to a server. (CVE-2017-9788)

Affected Packages:

httpd

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

New Packages:

i686:  
    httpd-tools-2.2.34-1.12.amzn1.i686  
    mod_ssl-2.2.34-1.12.amzn1.i686  
    httpd-debuginfo-2.2.34-1.12.amzn1.i686  
    httpd-devel-2.2.34-1.12.amzn1.i686  
    httpd-2.2.34-1.12.amzn1.i686  
  
noarch:  
    httpd-manual-2.2.34-1.12.amzn1.noarch  
  
src:  
    httpd-2.2.34-1.12.amzn1.src  
  
x86_64:  
    mod_ssl-2.2.34-1.12.amzn1.x86_64  
    httpd-devel-2.2.34-1.12.amzn1.x86_64  
    httpd-debuginfo-2.2.34-1.12.amzn1.x86_64  
    httpd-tools-2.2.34-1.12.amzn1.x86_64  
    httpd-2.2.34-1.12.amzn1.x86_64  

Additional References

Red Hat: CVE-2017-3167, CVE-2017-3169, CVE-2017-7679, CVE-2017-9788

Mitre: CVE-2017-3167, CVE-2017-3169, CVE-2017-7679, CVE-2017-9788

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

7.5 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

0.468 Medium

EPSS

Percentile

97.4%

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