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cve[email protected]CVE-2019-20398
HistoryJan 22, 2020 - 10:15 p.m.

CVE-2019-20398

2020-01-2222:15:10
CWE-476
web.nvd.nist.gov
61
libyang
vulnerability
null pointer dereference
parsing
untrusted input
crash
nvd
cve-2019-20398

4.3 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:N/I:N/A:P

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

6.4 Medium

AI Score

Confidence

High

0.003 Low

EPSS

Percentile

68.0%

A NULL pointer dereference is present in libyang before v1.0-r3 in the function lys_extension_instances_free() due to a copy of unresolved extensions in lys_restr_dup(). Applications that use libyang to parse untrusted input yang files may crash.

Affected configurations

NVD
Node
cesnetlibyangMatch0.11r1
OR
cesnetlibyangMatch0.11r2
OR
cesnetlibyangMatch0.12r1
OR
cesnetlibyangMatch0.12r2
OR
cesnetlibyangMatch0.13r1
OR
cesnetlibyangMatch0.13r2
OR
cesnetlibyangMatch0.14r1
OR
cesnetlibyangMatch0.15r1
OR
cesnetlibyangMatch0.16r1
OR
cesnetlibyangMatch0.16r2
OR
cesnetlibyangMatch0.16r3
OR
cesnetlibyangMatch1.0r1
OR
cesnetlibyangMatch1.0r2

4.3 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:N/I:N/A:P

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

6.4 Medium

AI Score

Confidence

High

0.003 Low

EPSS

Percentile

68.0%