CVE-2019-20373

LTSP LDM through 2.18.06 allows fat-client root access because the LDM_USERNAME variable may have an empty value if the user's shell lacks support for Bourne shell syntax. This is related to a run-x-session script.

CVSS v3.0 7.8 HIGH
CVSS v2.0 7.2 HIGH

7.8^/10

CVSS v3.0 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

7.2^/10

CVSS v2.0 : HIGH

Vector : AV:L/AC:L/Au:N/C:C/I:C/A:C

Exploitability : 3.9 / Impact : 10.0

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
https://git.launchpad.net/~ltsp-upstream/ltsp/+git/ldm/commit/?id=c351ac69ef63ed6c84221cef73e409059661b8ba	Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/01/msg00007.html	Mailing List Patch Third Party Advisory
https://www.debian.org/security/2020/dsa-4601	Third Party Advisory

Advertisement

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:debian:debian_linux:8.0:::::::*
	cpe:2.3:o:debian:debian_linux:9.0:::::::*
	cpe:2.3:o:debian:debian_linux:10.0:::::::*

Configuration 2 (hide)

cpe:2.3:a:ltsp:ldm:*:*:*:*:*:*:*:*

Information

Published : 2020-01-09 15:15

Updated : 2020-01-24 07:11

NVD link : CVE-2019-20373

Mitre link : CVE-2019-20373

JSON object : View

CWE

NVD-CWE-noinfo

Advertisement

Products Affected

debian

debian_linux

ltsp

ldm

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://git.launchpad.net/~ltsp-upstream/ltsp/+git/ldm/commit/?id=c351ac69ef63ed6c84221cef73e409059661b8ba", "name": "https://git.launchpad.net/~ltsp-upstream/ltsp/+git/ldm/commit/?id=c351ac69ef63ed6c84221cef73e409059661b8ba", "tags": ["Patch", "Third Party Advisory"], "refsource": "MISC"}, {"url": "https://lists.debian.org/debian-lts-announce/2020/01/msg00007.html", "name": "[debian-lts-announce] 20200110 [SECURITY] [DLA 2064-1] ldm security update", "tags": ["Mailing List", "Patch", "Third Party Advisory"], "refsource": "MLIST"}, {"url": "https://www.debian.org/security/2020/dsa-4601", "name": "DSA-4601", "tags": ["Third Party Advisory"], "refsource": "DEBIAN"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "LTSP LDM through 2.18.06 allows fat-client root access because the LDM_USERNAME variable may have an empty value if the user's shell lacks support for Bourne shell syntax. This is related to a run-x-session script."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2019-20373", "ASSIGNER": "cve@mitre.org"}}, "impact": {"baseMetricV2": {"cvssV2": {"version": "2.0", "baseScore": 7.2, "accessVector": "LOCAL", "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C", "authentication": "NONE", "integrityImpact": "COMPLETE", "accessComplexity": "LOW", "availabilityImpact": "COMPLETE", "confidentialityImpact": "COMPLETE"}, "severity": "HIGH", "acInsufInfo": false, "impactScore": 10.0, "obtainAllPrivilege": false, "exploitabilityScore": 3.9, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}, "baseMetricV3": {"cvssV3": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}}, "publishedDate": "2020-01-09T23:15Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:ltsp:ldm:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndIncluding": "2.18.06"}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2020-01-24T15:11Z"}