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CVE-2016-0797: OpenSSL can be crashed by crafted long numbers

CVE-2016-0797 · published 10 years ago

Summary

OpenSSL versions 1.0.1 up to 1.0.1s and 1.0.2 up to 1.0.2g may miscalculate the size of very long numeric strings. An attacker who sends such a string can cause the software to stop working, resulting in a denial of service. Upgrade OpenSSL to the latest version or apply the available security update to fix the issue.

What to do

Update debian openssl to version 1.0.2g-1.

Affected software

Ecosystem	Vendor	Product	Affected versions
Debian:12	debian	openssl	< 1.0.2g-1 Fix: upgrade to 1.0.2g-1
Debian:13	debian	openssl	< 1.0.2g-1 Fix: upgrade to 1.0.2g-1
Debian:14	debian	openssl	< 1.0.2g-1 Fix: upgrade to 1.0.2g-1
–	openssl	openssl	1.0.1 1.0.1a 1.0.1b 1.0.1c 1.0.1d 1.0.1e 1.0.1f 1.0.1g 1.0.1h 1.0.1i 1.0.1j 1.0.1k 14 more version ranges `cpe:2.3:a:openssl:openssl:1.0.1:::::::*`
–	nodejs	node.js	>= 4.0.0, < 4.1.2 >= 4.2.0, < 4.3.2 >= 5.0.0, < 5.7.1 `cpe:2.3:a:nodejs:node.js:::::-:::*`
–	canonical	ubuntu_linux	12.04 14.04 15.10 `cpe:2.3:o:canonical:ubuntu_linux:12.04::::-:::`
–	debian	debian_linux	7.0 8.0 `cpe:2.3:o:debian:debian_linux:7.0:::::::*`

Original advisory text

Multiple integer overflows in OpenSSL 1.0.1 before 1.0.1s and 1.0.2 before 1.0.2g allow remote attackers to 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.

References

http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759 Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00001.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00002.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00003.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00004.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00005.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00006.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00007.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00009.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00010.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00011.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00012.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00017.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00025.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00038.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00015.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00017.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00019.html Mailing List Third Party Advisory
http://marc.info/?l=bugtraq&m=145889460330120&w=2 Mailing List Third Party Advisory
http://openssl.org/news/secadv/20160301.txt Vendor Advisory
http://rhn.redhat.com/errata/RHSA-2016-2957.html Third Party Advisory
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20... Third Party Advisory
http://www.debian.org/security/2016/dsa-3500 Third Party Advisory
http://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.html Patch Third Party Advisory
http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html Patch Third Party Advisory
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html Third Party Advisory
http://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.html Third Party Advisory
http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.h... Third Party Advisory
http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.htm... Third Party Advisory
http://www.securityfocus.com/bid/83763 Third Party Advisory VDB Entry
http://www.securityfocus.com/bid/91787 Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1035133 Third Party Advisory VDB Entry
http://www.ubuntu.com/usn/USN-2914-1 Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=c175308407858afff3fc8c2e5e...
https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na... Third Party Advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c... Third Party Advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c... Third Party Advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c... Third Party Advisory
https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA40168 Third Party Advisory
https://kc.mcafee.com/corporate/index?page=content&id=SB10156 Third Party Advisory
https://security.FreeBSD.org/advisories/FreeBSD-SA-16:12.openssl.asc Third Party Advisory
https://security.gentoo.org/glsa/201603-15 Third Party Advisory
https://www.openssl.org/news/secadv/20160301.txt Vendor Advisory
https://security-tracker.debian.org/tracker/CVE-2016-0797 Vendor Advisory

Severity

7.5 High

Exploitation

27% chance of attack within 30 days

Timeline

Published3 Mar 2016

Updated29 Sep 2026

First seen22 Sep 2026

Sources

CVE-2016-0797 · NVD

DEBIAN-CVE-2016-0797 · OSV

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