AmazonALAS2-2018-1012Medium: libvncserver
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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.9 High
AI Score
Confidence
High
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
0.013 Low
EPSS
Percentile
85.4%
Issue Overview:
Improper input sanitization in rfbProcessClientNormalMessage in rfbserver.c
An issue was discovered in LibVNCServer through 0.9.11. rfbProcessClientNormalMessage() in rfbserver.c does not sanitize msg.cct.length, leading to access to uninitialized and potentially sensitive data or possibly unspecified other impact (e.g., an integer overflow) via specially crafted VNC packets.(CVE-2018-7225)
Affected Packages:
libvncserver
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 libvncserver to update your system.
New Packages:
src:
libvncserver-0.9.9-12.amzn2.src
x86_64:
libvncserver-0.9.9-12.amzn2.x86_64
libvncserver-devel-0.9.9-12.amzn2.x86_64
libvncserver-debuginfo-0.9.9-12.amzn2.x86_64
Additional References
Red Hat: CVE-2018-7225
Mitre: CVE-2018-7225
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| Amazon Linux | 2 | x86_64 | libvncserver | < 0.9.9-12.amzn2 | libvncserver-0.9.9-12.amzn2.x86_64.rpm |
| Amazon Linux | 2 | x86_64 | libvncserver-devel | < 0.9.9-12.amzn2 | libvncserver-devel-0.9.9-12.amzn2.x86_64.rpm |
| Amazon Linux | 2 | x86_64 | libvncserver-debuginfo | < 0.9.9-12.amzn2 | libvncserver-debuginfo-0.9.9-12.amzn2.x86_64.rpm |
Related
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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.9 High
AI Score
Confidence
High
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
0.013 Low
EPSS
Percentile
85.4%