CVE-2019-20393

CVSS V2 Medium 6.8 CVSS V3 High 8.8
Description
A double-free is present in libyang before v1.0-r1 in the function yyparse() when an empty description is used. Applications that use libyang to parse untrusted input yang files may be vulnerable to this flaw, which would cause a crash or potentially code execution.
Overview
  • CVE ID
  • CVE-2019-20393
  • Assigner
  • cve@mitre.org
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2020-01-22T22:15:10
  • Last Modified Date
  • 2020-01-23T21:19:00
Weakness Enumerations
CWE URL
CWE-415 http://cwe.mitre.org/data/definitions/415.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:cesnet:libyang:0.11:r1:*:*:*:*:*:* 1 OR
cpe:2.3:a:cesnet:libyang:0.11:r2:*:*:*:*:*:* 1 OR
cpe:2.3:a:cesnet:libyang:0.12:r1:*:*:*:*:*:* 1 OR
cpe:2.3:a:cesnet:libyang:0.12:r2:*:*:*:*:*:* 1 OR
cpe:2.3:a:cesnet:libyang:0.13:r1:*:*:*:*:*:* 1 OR
cpe:2.3:a:cesnet:libyang:0.13:r2:*:*:*:*:*:* 1 OR
cpe:2.3:a:cesnet:libyang:0.14:r1:*:*:*:*:*:* 1 OR
cpe:2.3:a:cesnet:libyang:0.15:r1:*:*:*:*:*:* 1 OR
cpe:2.3:a:cesnet:libyang:0.16:r1:*:*:*:*:*:* 1 OR
cpe:2.3:a:cesnet:libyang:0.16:r2:*:*:*:*:*:* 1 OR
cpe:2.3:a:cesnet:libyang:0.16:r3:*:*:*:*:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:M/Au:N/C:P/I:P/A:P
  • Access Vector
  • NETWORK
  • Access Compatibility
  • MEDIUM
  • Authentication
  • NONE
  • Confidentiality Impact
  • PARTIAL
  • Integrity Impact
  • PARTIAL
  • Availability Impact
  • PARTIAL
  • Base Score
  • 6.8
  • Severity
  • MEDIUM
  • Exploitability Score
  • 8.6
  • Impact Score
  • 6.4
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • REQUIRED
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • HIGH
  • Availability Impact
  • HIGH
  • Base Score
  • 8.8
  • Base Severity
  • HIGH
  • Exploitability Score
  • 2.8
  • Impact Score
  • 5.9
References
Reference URL Reference Tags
https://github.com/CESNET/libyang/commit/d9feacc4a590d35dbc1af21caf9080008b4450ed Patch Third Party Advisory
https://github.com/CESNET/libyang/compare/v0.16-r3...v1.0-r1 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1793930 Issue Tracking Patch Third Party Advisory
https://github.com/CESNET/libyang/issues/742 Exploit Third Party Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2019-20393
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-20393
History
Created Old Value New Value Data Type Notes
2022-05-10 16:52:38 Added to TrackCVE
2022-12-04 09:57:22 2020-01-22T22:15Z 2020-01-22T22:15:10 CVE Published Date updated
2022-12-04 09:57:22 2020-01-23T21:19:00 CVE Modified Date updated
2022-12-04 09:57:22 Analyzed Vulnerability Status updated