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amazonAmazonALAS2-2020-1442
HistoryJun 26, 2020 - 10:51 p.m.

Medium: json-c

2020-06-2622:51:00
alas.aws.amazon.com
22

CVSS2

6.8

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

CVSS3

7.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

AI Score

8.2

Confidence

High

EPSS

0.001

Percentile

44.5%

Issue Overview:

json-c through 0.14 has an integer overflow and out-of-bounds write via a large JSON file, as demonstrated by printbuf_memappend. (CVE-2020-12762)

Affected Packages:

json-c

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 json-c to update your system.

New Packages:

aarch64:  
    json-c-0.11-4.amzn2.0.4.aarch64  
    json-c-devel-0.11-4.amzn2.0.4.aarch64  
    json-c-debuginfo-0.11-4.amzn2.0.4.aarch64  
  
i686:  
    json-c-0.11-4.amzn2.0.4.i686  
    json-c-devel-0.11-4.amzn2.0.4.i686  
    json-c-debuginfo-0.11-4.amzn2.0.4.i686  
  
noarch:  
    json-c-doc-0.11-4.amzn2.0.4.noarch  
  
src:  
    json-c-0.11-4.amzn2.0.4.src  
  
x86_64:  
    json-c-0.11-4.amzn2.0.4.x86_64  
    json-c-devel-0.11-4.amzn2.0.4.x86_64  
    json-c-debuginfo-0.11-4.amzn2.0.4.x86_64  

Additional References

Red Hat: CVE-2020-12762

Mitre: CVE-2020-12762

CVSS2

6.8

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

CVSS3

7.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

AI Score

8.2

Confidence

High

EPSS

0.001

Percentile

44.5%