#VU89734 Buffer overflow in OpenSSL - CVE-2016-2842

Vulnerability identifier: #VU89734

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2016-2842

CWE-ID: CWE-119

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 cause a denial of service.

The vulnerability exists due to a doapr_outch function in crypto/bio/b_print.c in OpenSSL does not verify that a certain memory allocation succeeds. A remote attacker can cause a denial of service (out-of-bounds write or memory consumption) or possibly have unspecified other impact via a long string

Mitigation
Install updates from vendor's website.

Vulnerable software versions

OpenSSL: 1.0.0t - 1.0.0p, 1.0.1i - 1.0.1p

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External links
https://marc.info/?l=bugtraq&m=145983526810210&w=2
https://marc.info/?l=bugtraq&m=146108058503441&w=2
https://openssl.org/news/secadv/20160301.txt
https://rhn.redhat.com/errata/RHSA-2016-0722.html
https://rhn.redhat.com/errata/RHSA-2016-0996.html
https://rhn.redhat.com/errata/RHSA-2016-2073.html
https://rhn.redhat.com/errata/RHSA-2016-2957.html
https://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
https://www.securityfocus.com/bid/84169
https://git.openssl.org/?p=openssl.git;a=commit;h=578b956fe741bf8e84055547b1e83c28dd902c73
https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03741en_us
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05068681
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05086877
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05111017
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05126404
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05131085
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05135617
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05141441
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05150736
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05150800
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05150888
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05157667
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05158380
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05376917
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05390722
https://kc.mcafee.com/corporate/index?page=content&id=SB10152
https://security.netapp.com/advisory/ntap-20160321-0001/

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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.