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Vulnerability Details :

CVE-2020-4044

Summary
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
Published At-30 Jun, 2020 | 15:55
Updated At-04 Aug, 2024 | 07:52
Rejected At-
Credits

Local users can perform a buffer overflow attack against the xrdp-sesman service and then impersonate it

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.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:GitHub_M
Assigner Org ID:a0819718-46f1-4df5-94e2-005712e83aaa
Published At:30 Jun, 2020 | 15:55
Updated At:04 Aug, 2024 | 07:52
Rejected At:
▼CVE Numbering Authority (CNA)
Local users can perform a buffer overflow attack against the xrdp-sesman service and then impersonate it

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.

Affected Products
Vendor
neutrinolabs
Product
xrdp
Versions
Affected
  • < 0.9.13.1
Problem Types
TypeCWE IDDescription
CWECWE-121CWE-121: Stack-based Buffer Overflow
Type: CWE
CWE ID: CWE-121
Description: CWE-121: Stack-based Buffer Overflow
Metrics
VersionBase scoreBase severityVector
3.17.5HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Version: 3.1
Base score: 7.5
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-j9fv-6fwf-p3g4
x_refsource_CONFIRM
https://github.com/neutrinolabs/xrdp/releases/tag/v0.9.13.1
x_refsource_MISC
https://github.com/neutrinolabs/xrdp/commit/0c791d073d0eb344ee7aaafd221513dc9226762c
x_refsource_MISC
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00036.html
vendor-advisory
x_refsource_SUSE
https://www.debian.org/security/2020/dsa-4737
vendor-advisory
x_refsource_DEBIAN
https://lists.debian.org/debian-lts-announce/2020/08/msg00015.html
mailing-list
x_refsource_MLIST
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00037.html
vendor-advisory
x_refsource_SUSE
Hyperlink: https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-j9fv-6fwf-p3g4
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/neutrinolabs/xrdp/releases/tag/v0.9.13.1
Resource:
x_refsource_MISC
Hyperlink: https://github.com/neutrinolabs/xrdp/commit/0c791d073d0eb344ee7aaafd221513dc9226762c
Resource:
x_refsource_MISC
Hyperlink: http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00036.html
Resource:
vendor-advisory
x_refsource_SUSE
Hyperlink: https://www.debian.org/security/2020/dsa-4737
Resource:
vendor-advisory
x_refsource_DEBIAN
Hyperlink: https://lists.debian.org/debian-lts-announce/2020/08/msg00015.html
Resource:
mailing-list
x_refsource_MLIST
Hyperlink: http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00037.html
Resource:
vendor-advisory
x_refsource_SUSE
▼Authorized Data Publishers (ADP)
CVE Program Container
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-j9fv-6fwf-p3g4
x_refsource_CONFIRM
x_transferred
https://github.com/neutrinolabs/xrdp/releases/tag/v0.9.13.1
x_refsource_MISC
x_transferred
https://github.com/neutrinolabs/xrdp/commit/0c791d073d0eb344ee7aaafd221513dc9226762c
x_refsource_MISC
x_transferred
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00036.html
vendor-advisory
x_refsource_SUSE
x_transferred
https://www.debian.org/security/2020/dsa-4737
vendor-advisory
x_refsource_DEBIAN
x_transferred
https://lists.debian.org/debian-lts-announce/2020/08/msg00015.html
mailing-list
x_refsource_MLIST
x_transferred
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00037.html
vendor-advisory
x_refsource_SUSE
x_transferred
Hyperlink: https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-j9fv-6fwf-p3g4
Resource:
x_refsource_CONFIRM
x_transferred
Hyperlink: https://github.com/neutrinolabs/xrdp/releases/tag/v0.9.13.1
Resource:
x_refsource_MISC
x_transferred
Hyperlink: https://github.com/neutrinolabs/xrdp/commit/0c791d073d0eb344ee7aaafd221513dc9226762c
Resource:
x_refsource_MISC
x_transferred
Hyperlink: http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00036.html
Resource:
vendor-advisory
x_refsource_SUSE
x_transferred
Hyperlink: https://www.debian.org/security/2020/dsa-4737
Resource:
vendor-advisory
x_refsource_DEBIAN
x_transferred
Hyperlink: https://lists.debian.org/debian-lts-announce/2020/08/msg00015.html
Resource:
mailing-list
x_refsource_MLIST
x_transferred
Hyperlink: http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00037.html
Resource:
vendor-advisory
x_refsource_SUSE
x_transferred
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security-advisories@github.com
Published At:30 Jun, 2020 | 16:15
Updated At:14 Aug, 2020 | 21:15

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Primary3.17.8HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Secondary3.17.5HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Primary2.04.6MEDIUM
AV:L/AC:L/Au:N/C:P/I:P/A:P
Type: Primary
Version: 3.1
Base score: 7.8
Base severity: HIGH
Vector:
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Type: Secondary
Version: 3.1
Base score: 7.5
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Type: Primary
Version: 2.0
Base score: 4.6
Base severity: MEDIUM
Vector:
AV:L/AC:L/Au:N/C:P/I:P/A:P
CPE Matches
neutrinolabs
neutrinolabs
>>xrdp>>Versions before 0.9.13.1(exclusive)
cpe:2.3:a:neutrinolabs:xrdp:*:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-121Primarysecurity-advisories@github.com
CWE ID: CWE-121
Type: Primary
Source: security-advisories@github.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00036.htmlsecurity-advisories@github.com
N/A
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00037.htmlsecurity-advisories@github.com
N/A
https://github.com/neutrinolabs/xrdp/commit/0c791d073d0eb344ee7aaafd221513dc9226762csecurity-advisories@github.com
Patch
Third Party Advisory
https://github.com/neutrinolabs/xrdp/releases/tag/v0.9.13.1security-advisories@github.com
Release Notes
Third Party Advisory
https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-j9fv-6fwf-p3g4security-advisories@github.com
Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/08/msg00015.htmlsecurity-advisories@github.com
N/A
https://www.debian.org/security/2020/dsa-4737security-advisories@github.com
N/A
Hyperlink: http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00036.html
Source: security-advisories@github.com
Resource: N/A
Hyperlink: http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00037.html
Source: security-advisories@github.com
Resource: N/A
Hyperlink: https://github.com/neutrinolabs/xrdp/commit/0c791d073d0eb344ee7aaafd221513dc9226762c
Source: security-advisories@github.com
Resource:
Patch
Third Party Advisory
Hyperlink: https://github.com/neutrinolabs/xrdp/releases/tag/v0.9.13.1
Source: security-advisories@github.com
Resource:
Release Notes
Third Party Advisory
Hyperlink: https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-j9fv-6fwf-p3g4
Source: security-advisories@github.com
Resource:
Third Party Advisory
Hyperlink: https://lists.debian.org/debian-lts-announce/2020/08/msg00015.html
Source: security-advisories@github.com
Resource: N/A
Hyperlink: https://www.debian.org/security/2020/dsa-4737
Source: security-advisories@github.com
Resource: N/A

Change History

0
Information is not available yet

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