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amazonAmazonALAS2-2018-1014
HistoryMay 10, 2018 - 5:24 p.m.

Important: corosync

2018-05-1017:24:00
alas.aws.amazon.com
13

CVSS2

7.5

Attack Vector

NETWORK

Attack 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

CVSS3

7.5

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

AI Score

7.6

Confidence

High

EPSS

0.036

Percentile

91.7%

Issue Overview:

Integer overflow in exec/totemcrypto.c:authenticate_nss_2_3() function
An integer overflow leading to an out-of-bound read was found in authenticate_nss_2_3() in Corosync. An attacker could craft a malicious packet that would lead to a denial of service.(CVE-2018-1084)

Affected Packages:

corosync

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 corosync to update your system.

New Packages:

src:  
    corosync-2.4.3-2.amzn2.1.src  
  
x86_64:  
    corosync-2.4.3-2.amzn2.1.x86_64  
    corosync-debuginfo-2.4.3-2.amzn2.1.x86_64  
    corosynclib-2.4.3-2.amzn2.1.x86_64  
    corosynclib-devel-2.4.3-2.amzn2.1.x86_64  
    corosync-qdevice-2.4.3-2.amzn2.1.x86_64  
    corosync-qnetd-2.4.3-2.amzn2.1.x86_64  

Additional References

Red Hat: CVE-2018-1084

Mitre: CVE-2018-1084

CVSS2

7.5

Attack Vector

NETWORK

Attack 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

CVSS3

7.5

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

AI Score

7.6

Confidence

High

EPSS

0.036

Percentile

91.7%