PT-2017-3946 · Openssl+3 · Openssl+3

Publicado 2017-01-30 · Atualizado 2019-04-23 · CVE-2017-3733

Positive Technologies (AI Summary)

CVSS v2.0

7.8

Alta

Vetor base

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

Name of the Vulnerable Software and Affected Versions OpenSSL versions prior to 1.1.0e

Description The issue is related to insufficient input validation in the Encrypt-Then-Mac extension of the OpenSSL library. This can be exploited by a remote attacker to cause a denial of service, resulting in a crash. The vulnerability is triggered during a renegotiation handshake when the Encrypt-Then-Mac extension is negotiated differently than in the original handshake. Both clients and servers are affected.

Recommendations For OpenSSL versions prior to 1.1.0e, update to version 1.1.0e or later to resolve the issue. As a temporary workaround, consider restricting the use of the Encrypt-Then-Mac extension during renegotiation handshakes until a patch is applied.

Exploit

Correção

DoS

RCE

Enumeração de Fraquezas

CWE-20

Identificadores relacionados

ALT-PU-2017-2639

BDU:2020-02911

CVE-2017-3733

MGASA-2017-0390

Produtos afetados

Alt Linux

Cisco Wls

Openssl

Virtualbox

Referências · 46

• 🔥 https://github.com/fundacion-sadosky/vbox_cve_2017_10235 · Exploit
• https://github.com/openssl/openssl/commit/4ad93618d26a3ea23d36ad5498ff4f59eff3a4d2 · Nota
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-10236 · Nota de Segurança
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-10187 · Nota de Segurança
• https://errata.altlinux.org/ALT-PU-2017-2639 · Aviso do Fabricante
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-10129 · Nota de Segurança
• https://openssl.org/news/secadv/20170216.txt · Aviso do Fabricante
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-10238 · Nota de Segurança
• https://nvd.nist.gov/vuln/detail/CVE-2017-3733 · Nota de Segurança
• https://bdu.fstec.ru/vul/2020-02911 · Nota de Segurança
• https://cve.org/CVERecord?id=CVE-2017-3733 · Nota de Segurança
• https://ubuntu.com/security/CVE-2017-3733 · Aviso do Fabricante
• https://osv.dev/vulnerability/MGASA-2017-0390 · Aviso do Fabricante
• https://advisories.mageia.org/MGASA-2017-0390.html · Nota de Segurança
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-10240 · Nota de Segurança