#VU32244 Input validation error in OpenSSL - CVE-2016-0797
Vulnerability identifier: #VU32244
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:
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 remote attackers to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can cause a denial of service (heap memory corruption or NULL pointer dereference) or possibly have unspecified other impact via a long digit string that is mishandled by the (1) BN_dec2bn or (2) BN_hex2bn function, related to crypto/bn/bn.h and crypto/bn/bn_print.c.
Mitigation
Update to version 1.0.1s.
Vulnerable software versions
OpenSSL: 1.0.1r - 1.0.1p
External links
https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759
https://lists.opensuse.org/opensuse-security-announce/2016-03/msg00001.html
https://lists.opensuse.org/opensuse-security-announce/2016-03/msg00002.html
https://lists.opensuse.org/opensuse-security-announce/2016-03/msg00003.html
https://lists.opensuse.org/opensuse-security-announce/2016-03/msg00004.html
https://lists.opensuse.org/opensuse-security-announce/2016-03/msg00005.html
https://lists.opensuse.org/opensuse-security-announce/2016-03/msg00006.html
https://lists.opensuse.org/opensuse-security-announce/2016-03/msg00007.html
https://lists.opensuse.org/opensuse-security-announce/2016-03/msg00009.html
https://lists.opensuse.org/opensuse-security-announce/2016-03/msg00010.html
https://lists.opensuse.org/opensuse-security-announce/2016-03/msg00011.html
https://lists.opensuse.org/opensuse-security-announce/2016-03/msg00012.html
https://lists.opensuse.org/opensuse-security-announce/2016-03/msg00017.html
https://lists.opensuse.org/opensuse-security-announce/2016-03/msg00025.html
https://lists.opensuse.org/opensuse-security-announce/2016-04/msg00038.html
https://lists.opensuse.org/opensuse-security-announce/2016-05/msg00015.html
https://lists.opensuse.org/opensuse-security-announce/2016-05/msg00017.html
https://lists.opensuse.org/opensuse-security-announce/2016-06/msg00019.html
https://marc.info/?l=bugtraq&m=145889460330120&w=2
https://openssl.org/news/secadv/20160301.txt
https://rhn.redhat.com/errata/RHSA-2016-2957.html
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160302-openssl
https://www.debian.org/security/2016/dsa-3500
https://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.html
https://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html
https://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
https://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.html
https://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
https://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
https://www.securityfocus.com/bid/83763
https://www.securityfocus.com/bid/91787
https://www.securitytracker.com/id/1035133
https://www.ubuntu.com/usn/USN-2914-1
https://git.openssl.org/?p=openssl.git;a=commit;h=c175308407858afff3fc8c2e5e085d94d12edc7d
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-c05052990
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://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA40168
https://kc.mcafee.com/corporate/index?page=content&id=SB10156
https://security.FreeBSD.org/advisories/FreeBSD-SA-16:12.openssl.asc
https://security.gentoo.org/glsa/201603-15
https://www.openssl.org/news/secadv/20160301.txt
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.
