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MitreCVE-2018-19976

HistoryDec 17, 2018 - 7:29 p.m.

CVE-2018-19976

2018-12-1719:29:02

CWE-200

mitre

web.nvd.nist.gov

yara

3.8.1

bytecode

environment information

vulnerability

cve-2018-19976

nvd

CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

CVSS3

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

AI Score

5.1

Confidence

High

EPSS

0.001

Percentile

45.7%

JSON

In YARA 3.8.1, bytecode in a specially crafted compiled rule is exposed to information about its environment, in libyara/exec.c. This is a consequence of the design of the YARA virtual machine.

Affected configurations

Nvd

Node

virustotalyaraMatch3.8.1

VendorProductVersionCPE
virustotalyara3.8.1cpe:2.3:a:virustotal:yara:3.8.1:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
virustotal	yara	3.8.1	cpe:2.3:a:virustotal:yara:3.8.1:::::::*

References

bnbdr.github.io/posts/extracheese/

github.com/bnbdr/swisscheese/

github.com/VirusTotal/yara/issues/999

lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DFFXDAMP6GJ337LIOTVF5I4T6QGMN3ZR/

CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

CVSS3

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

AI Score

5.1

Confidence

High

EPSS

0.001

Percentile

45.7%

JSON

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