Vulnerability identifier: #VU34864
Vulnerability risk: High
CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-415
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
libyang
Universal components / Libraries /
Libraries used by multiple products
Vendor: CESNET
Description
The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.
A double-free is present in libyang before v1.0-r3 in the function yyparse() when a type statement in used in a notification statement. 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.
Mitigation
Install update from vendor's website.
Vulnerable software versions
libyang: 0.11 - 1.0
External links
http://bugzilla.redhat.com/show_bug.cgi?id=1793932
http://github.com/CESNET/libyang/commit/6cc51b1757dfbb7cff92de074ada65e8523289a6
http://github.com/CESNET/libyang/compare/v1.0-r2...v1.0-r3
http://github.com/CESNET/libyang/issues/769
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.