CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
26.1%
Debian LTS Advisory DLA-2319-1 [email protected]
https://www.debian.org/lts/security/ Abhijith PA
August 09, 2020 https://wiki.debian.org/LTS
Package : xrdp
Version : 0.9.1-9+deb9u4
CVE ID : CVE-2020-4044
Debian Bug : 964573
xrdp-sesman service in xrdp 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.
For Debian 9 stretch, this problem has been fixed in version
0.9.1-9+deb9u4.
We recommend that you upgrade your xrdp packages.
For the detailed security status of xrdp please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/xrdp
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Debian | 10 | arm64 | xrdp | < 0.9.9-1+deb10u1 | xrdp_0.9.9-1+deb10u1_arm64.deb |
Debian | 9 | all | xrdp | < 0.9.1-9+deb9u4 | xrdp_0.9.1-9+deb9u4_all.deb |
Debian | 9 | amd64 | xrdp | < 0.9.1-9+deb9u4 | xrdp_0.9.1-9+deb9u4_amd64.deb |
Debian | 9 | arm64 | xrdp | < 0.9.1-9+deb9u4 | xrdp_0.9.1-9+deb9u4_arm64.deb |
Debian | 10 | i386 | xrdp | < 0.9.9-1+deb10u1 | xrdp_0.9.9-1+deb10u1_i386.deb |
Debian | 10 | mips64el | xrdp-dbgsym | < 0.9.9-1+deb10u1 | xrdp-dbgsym_0.9.9-1+deb10u1_mips64el.deb |
Debian | 10 | ppc64el | xrdp | < 0.9.9-1+deb10u1 | xrdp_0.9.9-1+deb10u1_ppc64el.deb |
Debian | 10 | armel | xrdp | < 0.9.9-1+deb10u1 | xrdp_0.9.9-1+deb10u1_armel.deb |
Debian | 10 | mips64el | xrdp | < 0.9.9-1+deb10u1 | xrdp_0.9.9-1+deb10u1_mips64el.deb |
Debian | 9 | armhf | xorgxrdp | < 0.9.1-9+deb9u4 | xorgxrdp_0.9.1-9+deb9u4_armhf.deb |
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
26.1%