Vulnerability-Lookup

SUSE-SU-2020:2142-1

Vulnerability from csaf_suse - Published: 2020-08-06 09:05 - Updated: 2020-08-06 09:05

Summary

Security update for xrdp

Notes

Title of the patch

Security update for xrdp

Description of the patch

This update for xrdp fixes the following issues: - Update to version 0.9.13.1 + This is a security fix release that includes fixes for the following local buffer overflow vulnerability (bsc#1173580): CVE-2020-4044

Patchnames

SUSE-2020-2142,SUSE-SLE-Module-Basesystem-15-SP2-2020-2142

CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).

JSON

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          "text": "https://www.suse.com/security/cve/CVE-2020-4044"
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          "category": "general",
          "text": "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.",
          "title": "CVE description"
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          "SUSE Linux Enterprise Module for Basesystem 15 SP2:xrdp-devel-0.9.13.1-4.3.1.ppc64le",
          "SUSE Linux Enterprise Module for Basesystem 15 SP2:xrdp-devel-0.9.13.1-4.3.1.s390x",
          "SUSE Linux Enterprise Module for Basesystem 15 SP2:xrdp-devel-0.9.13.1-4.3.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2020-4044",
          "url": "https://www.suse.com/security/cve/CVE-2020-4044"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1173580 for CVE-2020-4044",
          "url": "https://bugzilla.suse.com/1173580"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Linux Enterprise Module for Basesystem 15 SP2:libpainter0-0.9.13.1-4.3.1.aarch64",
            "SUSE Linux Enterprise Module for Basesystem 15 SP2:libpainter0-0.9.13.1-4.3.1.ppc64le",
            "SUSE Linux Enterprise Module for Basesystem 15 SP2:libpainter0-0.9.13.1-4.3.1.s390x",
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            "SUSE Linux Enterprise Module for Basesystem 15 SP2:librfxencode0-0.9.13.1-4.3.1.s390x",
            "SUSE Linux Enterprise Module for Basesystem 15 SP2:librfxencode0-0.9.13.1-4.3.1.x86_64",
            "SUSE Linux Enterprise Module for Basesystem 15 SP2:xrdp-0.9.13.1-4.3.1.aarch64",
            "SUSE Linux Enterprise Module for Basesystem 15 SP2:xrdp-0.9.13.1-4.3.1.ppc64le",
            "SUSE Linux Enterprise Module for Basesystem 15 SP2:xrdp-0.9.13.1-4.3.1.s390x",
            "SUSE Linux Enterprise Module for Basesystem 15 SP2:xrdp-0.9.13.1-4.3.1.x86_64",
            "SUSE Linux Enterprise Module for Basesystem 15 SP2:xrdp-devel-0.9.13.1-4.3.1.aarch64",
            "SUSE Linux Enterprise Module for Basesystem 15 SP2:xrdp-devel-0.9.13.1-4.3.1.ppc64le",
            "SUSE Linux Enterprise Module for Basesystem 15 SP2:xrdp-devel-0.9.13.1-4.3.1.s390x",
            "SUSE Linux Enterprise Module for Basesystem 15 SP2:xrdp-devel-0.9.13.1-4.3.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Enterprise Module for Basesystem 15 SP2:libpainter0-0.9.13.1-4.3.1.aarch64",
            "SUSE Linux Enterprise Module for Basesystem 15 SP2:libpainter0-0.9.13.1-4.3.1.ppc64le",
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            "SUSE Linux Enterprise Module for Basesystem 15 SP2:librfxencode0-0.9.13.1-4.3.1.ppc64le",
            "SUSE Linux Enterprise Module for Basesystem 15 SP2:librfxencode0-0.9.13.1-4.3.1.s390x",
            "SUSE Linux Enterprise Module for Basesystem 15 SP2:librfxencode0-0.9.13.1-4.3.1.x86_64",
            "SUSE Linux Enterprise Module for Basesystem 15 SP2:xrdp-0.9.13.1-4.3.1.aarch64",
            "SUSE Linux Enterprise Module for Basesystem 15 SP2:xrdp-0.9.13.1-4.3.1.ppc64le",
            "SUSE Linux Enterprise Module for Basesystem 15 SP2:xrdp-0.9.13.1-4.3.1.s390x",
            "SUSE Linux Enterprise Module for Basesystem 15 SP2:xrdp-0.9.13.1-4.3.1.x86_64",
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            "SUSE Linux Enterprise Module for Basesystem 15 SP2:xrdp-devel-0.9.13.1-4.3.1.s390x",
            "SUSE Linux Enterprise Module for Basesystem 15 SP2:xrdp-devel-0.9.13.1-4.3.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2020-08-06T09:05:38Z",
          "details": "important"
        }
      ],
      "title": "CVE-2020-4044"
    }
  ]
}

CVE-2020-4044 (GCVE-0-2020-4044)

Vulnerability from cvelistv5 – Published: 2020-06-30 15:55 – Updated: 2024-08-04 07:52

Title

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

Summary

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.

Severity ?

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-121 - Stack-based Buffer Overflow

Assigner

GitHub_M

References

URL

Tags

	https://github.com/neutrinolabs/xrdp/security/adv…	x_refsource_CONFIRM
	https://github.com/neutrinolabs/xrdp/releases/tag…	x_refsource_MISC
	https://github.com/neutrinolabs/xrdp/commit/0c791…	x_refsource_MISC
	http://lists.opensuse.org/opensuse-security-annou…	vendor-advisoryx_refsource_SUSE
	https://www.debian.org/security/2020/dsa-4737	vendor-advisoryx_refsource_DEBIAN
	https://lists.debian.org/debian-lts-announce/2020…	mailing-listx_refsource_MLIST
	http://lists.opensuse.org/opensuse-security-annou…	vendor-advisoryx_refsource_SUSE

Impacted products

	Vendor	Product	Version
	neutrinolabs	xrdp	Affected: < 0.9.13.1

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

SUSE-SU-2020:2142-1

CVE-2020-4044 (GCVE-0-2020-4044)

Tags

Sightings

Nomenclature