PT-2019-1107 · Libyang · Libyang

Jvijtiuko · Publicado 2019-03-29 · Atualizado 2023-09-20 · CVE-2019-20393

Positive Technologies (AI Summary)

CVSS v2.0

10

Alta

Vetor base

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

Name of the Vulnerable Software and Affected Versions: libyang versions prior to v1.0-r1

Description: A double-free issue is present in the yyparse() function when an empty description is used, potentially causing a crash or code execution. This issue affects applications that use libyang to parse untrusted input yang files. The flaw can be exploited by a remote attacker to execute arbitrary code or cause a denial of service.

Recommendations: For versions prior to v1.0-r1, update to version v1.0-r1 or later to resolve the issue. As a temporary workaround, consider restricting the use of the yyparse() function when parsing untrusted input yang files until a patch is available. Avoid using empty descriptions in yang files to minimize the risk of exploitation.

Exploit

Correção

Double Free

Enumeração de Fraquezas

CWE-415

Identificadores relacionados

ALEA-2021:1906

BDU:2024-04986

CVE-2019-20393

DLA-3572-1

Produtos afetados

Libyang

Referências · 27

• 🔥 https://github.com/CESNET/libyang/issues/742 · Exploit
• https://github.com/CESNET/libyang/commit/d9feacc4a590d35dbc1af21caf9080008b4450ed · Correção
• https://github.com/CESNET/libyang/compare/v0.16-r3...v1.0-r1 · Nota
• https://vulners.com/cve/CVE-2019-20395 · Nota
• https://osv.dev/vulnerability/ALEA-2021:1906 · Aviso do Fabricante
• https://errata.almalinux.org/8/ALEA-2021-1906.html · Aviso do Fabricante
• https://lists.debian.org/debian-lts-announce/2023/09/msg00019.html · Nota
• https://osv.dev/vulnerability/UBUNTU-CVE-2019-20393 · Aviso do Fabricante
• https://nvd.nist.gov/vuln/detail/CVE-2019-20393 · Nota de Segurança
• https://osv.dev/vulnerability/DLA-3572-1 · Aviso do Fabricante
• https://vulners.com/cve/CVE-2019-20392 · Nota
• https://vulners.com/cve/CVE-2019-20397 · Nota
• https://security-tracker.debian.org/tracker/CVE-2019-20393 · Aviso do Fabricante
• https://vulners.com/cve/CVE-2019-20396 · Nota
• https://github.com/advisories/GHSA-xr5g-jrq4-w3j4 · Nota