#VU82376 Buffer overflow in OpenSSL - CVE-2016-0799
Vulnerability identifier: #VU82376
Vulnerability risk: High
CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]
CVE-ID:
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 execute arbitrary code on the target system.
The vulnerability exists due to fmtstr function in crypto/bio/b_print.c in OpenSSL improperly calculates string lengths. A remote attacker can cause a denial of service (overflow and out-of-bounds read) 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
External links
https://git.openssl.org/?p=openssl.git;a=commit;h=578b956fe741bf8e84055547b1e83c28dd902c73
https://openssl.org/news/secadv/20160301.txt
https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA40168
https://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.html
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-c05068681
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-c05131085
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05150800
https://rhn.redhat.com/errata/RHSA-2016-0722.html
https://rhn.redhat.com/errata/RHSA-2016-0996.html
https://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html
https://www.securityfocus.com/bid/91787
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-c05086877
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-c05135617
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-c05126404
https://marc.info/?l=bugtraq&m=146108058503441&w=2
https://marc.info/?l=bugtraq&m=145983526810210&w=2
https://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
https://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html
https://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
https://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
https://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.html
https://www.securityfocus.com/bid/83755
https://lists.opensuse.org/opensuse-security-announce/2016-05/msg00015.html
https://lists.opensuse.org/opensuse-security-announce/2016-05/msg00017.html
https://www.openssl.org/news/secadv/20160301.txt
https://lists.opensuse.org/opensuse-security-announce/2016-03/msg00003.html
https://lists.opensuse.org/opensuse-security-announce/2016-03/msg00007.html
https://www.debian.org/security/2016/dsa-3500
https://security.gentoo.org/glsa/201603-15
https://lists.opensuse.org/opensuse-security-announce/2016-03/msg00025.html
https://lists.opensuse.org/opensuse-security-announce/2016-03/msg00002.html
https://lists.opensuse.org/opensuse-security-announce/2016-03/msg00006.html
https://lists.fedoraproject.org/pipermail/package-announce/2016-March/178358.html
https://www.ubuntu.com/usn/USN-2914-1
https://lists.opensuse.org/opensuse-security-announce/2016-03/msg00010.html
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160302-openssl
https://lists.opensuse.org/opensuse-security-announce/2016-03/msg00009.html
https://lists.opensuse.org/opensuse-security-announce/2016-03/msg00001.html
https://lists.opensuse.org/opensuse-security-announce/2016-03/msg00017.html
https://lists.opensuse.org/opensuse-security-announce/2016-03/msg00004.html
https://lists.opensuse.org/opensuse-security-announce/2016-03/msg00011.html
https://lists.opensuse.org/opensuse-security-announce/2016-04/msg00038.html
https://lists.opensuse.org/opensuse-security-announce/2016-03/msg00012.html
https://lists.fedoraproject.org/pipermail/package-announce/2016-March/178817.html
https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759
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://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03741en_us
https://www.securitytracker.com/id/1035133
https://security.FreeBSD.org/advisories/FreeBSD-SA-16:12.openssl.asc
https://rhn.redhat.com/errata/RHSA-2016-2957.html
https://rhn.redhat.com/errata/RHSA-2016-2073.html
https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
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.
