Stack-based Buffer Overflow Affecting librfxencode0 package, versions <0.9.6-4.8.1


Severity

Recommended
0.0
high
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.06% (29th percentile)

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  • Snyk IDSNYK-SLES151-LIBRFXENCODE0-2708423
  • published14 Apr 2022
  • disclosed15 Jul 2020

Introduced: 15 Jul 2020

CVE-2020-4044  (opens in a new tab)
CWE-121  (opens in a new tab)

How to fix?

Upgrade SLES:15.1 librfxencode0 to version 0.9.6-4.8.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream librfxencode0 package and not the librfxencode0 package as distributed by SLES. See How to fix? for SLES:15.1 relevant fixed versions and status.

The xrdp-sesman service before version 0.9.13.1 can be crashed by connecting over port 3350 and supplying a malicious payload. Once the xrdp-sesman process is dead, an unprivileged attacker on the server could then proceed to start their own imposter sesman service listening on port 3350. This will allow them to capture any user credentials that are submitted to XRDP and approve or reject arbitrary login credentials. For xorgxrdp sessions in particular, this allows an unauthorized user to hijack an existing session. This is a buffer overflow attack, so there may be a risk of arbitrary code execution as well.

CVSS Scores

version 3.1