#VU70397 Input validation error in OpenSSL - CVE-2015-0207

Vulnerability identifier: #VU70397

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2015-0207

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
OpenSSL
Server applications / Encryption software

Vendor: OpenSSL Software Foundation

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input in the dtls1_listen function in d1_lib.c. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

OpenSSL: 1.0.2

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External links
https://www.openssl.org/news/secadv_20150319.txt
https://git.openssl.org/?p=openssl.git;a=commit;h=819418110b6fff4a7b96f01a5d68f71df3e3b736
https://bugzilla.redhat.com/show_bug.cgi?id=1202351
https://www.securitytracker.com/id/1031929
https://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.html
https://www.oracle.com/technetwork/topics/security/cpuoct2015-2367953.html
https://bto.bluecoat.com/security-advisory/sa92
https://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html
https://marc.info/?l=bugtraq&m=144050297101809&w=2
https://marc.info/?l=bugtraq&m=143748090628601&w=2
https://marc.info/?l=bugtraq&m=144050155601375&w=2
https://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html
https://www.securityfocus.com/bid/73229
https://security.gentoo.org/glsa/201503-11
https://kc.mcafee.com/corporate/index?page=content&id=SB10110
https://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html

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Q & A

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.