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amazonAmazonALAS2-2018-1020
HistoryMay 24, 2018 - 5:59 p.m.

Medium: nghttp2

2018-05-2417:59:00
alas.aws.amazon.com
15

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

6.8 Medium

AI Score

Confidence

High

5 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

0.042 Low

EPSS

Percentile

92.1%

JSON

Issue Overview:

nghttp2 version >= 1.10.0 and nghttp2 <= v1.31.0 contains an Improper Input Validation CWE-20 vulnerability in ALTSVC frame handling that can result in segmentation fault leading to denial of service. This attack appears to be exploitable via network client. This vulnerability appears to have been fixed in >= 1.31.1. (CVE-2018-1000168)

Affected Packages:

nghttp2

Note:

This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.

Issue Correction:
Run yum update nghttp2 to update your system.

New Packages:

src:  
    nghttp2-1.31.1-1.amzn2.src  
  
x86_64:  
    nghttp2-1.31.1-1.amzn2.x86_64  
    libnghttp2-1.31.1-1.amzn2.x86_64  
    libnghttp2-devel-1.31.1-1.amzn2.x86_64  
    nghttp2-debuginfo-1.31.1-1.amzn2.x86_64

Additional References

Red Hat: CVE-2018-1000168

Mitre: CVE-2018-1000168

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7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

6.8 Medium

AI Score

Confidence

High

5 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

0.042 Low

EPSS

Percentile

92.1%

JSON
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