Vulnerability identifier: #VU34861
Vulnerability risk: Medium
CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-119
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 perform a denial of service (DoS) attack.
An invalid memory access flaw is present in libyang before v1.0-r3 in the function resolve_feature_value() when an if-feature statement is used inside a bit. Applications that use libyang to parse untrusted input yang files may crash.
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=1793934
http://github.com/CESNET/libyang/commit/bdb596ddc07596fa212f231135b87d0b9178f6f8
http://github.com/CESNET/libyang/compare/v1.0-r2...v1.0-r3
http://github.com/CESNET/libyang/issues/772
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.