Null Pointer Dereference Vulnerability in libyang by CESNET
CVE-2021-28905

7.5HIGH

Key Information:

Vendor

Cesnet

Status
Libyang
Vendor
CVE Published:
20 May 2021

What is CVE-2021-28905?

The vulnerability arises in the 'lys_node_free()' function of libyang versions up to v1.0.225, where the assertion checks that 'node->module' cannot be NULL. In specific scenarios, this condition can fail, allowing a NULL value for 'node->module' and leading to a reachable assertion error. This flaw could result in potential software crashes or unexpected behavior, emphasizing the need for secure coding practices and thorough input validation.

References

https://github.com/CESNET/libyang/issues/1452
x_refsource_CONFIRM
https://security.gentoo.org/glsa/202107-54
vendor-advisoryx_refsource_GENTOO

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.