CVE-2021-28902 — HIGH (7.5)

Vulnerability Description

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.

CVSS Score

7.5

HIGH

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Cesnet	Libyang	<= 1.0.225

Related Weaknesses (CWE)

CWE-252

References

https://github.com/CESNET/libyang/issues/1454ExploitIssue TrackingThird Party Advisory
https://security.gentoo.org/glsa/202107-54Third Party Advisory
https://github.com/CESNET/libyang/issues/1454ExploitIssue TrackingThird Party Advisory
https://security.gentoo.org/glsa/202107-54Third Party Advisory

FAQ

What is CVE-2021-28902?

CVE-2021-28902 is a vulnerability with a CVSS score of 7.5 (HIGH). 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]->fl...

How severe is CVE-2021-28902?

CVE-2021-28902 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-28902?

Check the references section above for vendor advisories and patch information. Affected products include: Cesnet Libyang.