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Integer Overflow or Wraparound Affecting libvncserver-debuginfo package, versions <0:0.9.9-12.amzn2

Severity

 Recommended
0.0
medium
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.66% (80th percentile)

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  • Snyk IDSNYK-AMZN2-LIBVNCSERVERDEBUGINFO-1662773
  • published27 Sept 2021
  • disclosed19 Feb 2018
Report a new vulnerability Found a mistake?

Introduced: 19 Feb 2018

CVE-2018-7225  (opens in a new tab)
CWE-190  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 libvncserver-debuginfo to version 0:0.9.9-12.amzn2 or higher.
This issue was patched in ALAS2-2018-1012.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libvncserver-debuginfo package and not the libvncserver-debuginfo package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

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.