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Debian Security Bug TrackerDEBIANCVE:CVE-2021-28902

HistoryMay 20, 2021 - 7:15 p.m.

CVE-2021-28902

2021-05-2019:15:07

Debian Security Bug Tracker

security-tracker.debian.org

libyang

read_yin_container

null value

crash

vulnerability

cve-2021-28902

flags

operation

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

EPSS

0.001

Percentile

45.7%

JSON

In function read_yin_container() in libyang <= v1.0.225, it doesn’t check whether the value of retval->ext[r] is NULL. In some cases, it can be NULL, which leads to the operation of retval->ext[r]->flags that results in a crash.

OSVersionArchitecturePackageVersionFilename
Debian11alllibyang<= 1.0.225-1.1libyang_1.0.225-1.1_all.deb

OS	Version	Architecture	Package	Version	Filename
Debian	11	all	libyang	<= 1.0.225-1.1	libyang_1.0.225-1.1_all.deb

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

EPSS

0.001

Percentile

45.7%

JSON

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