CVE-2016-6303
Integer overflow in the MDC2_Update function in crypto/mdc2/mdc2dgst.c in OpenSSL before 1.1.0 allows remote attackers to cause a denial of service (out-of-bounds write and application crash) or possibly have unspecified other impact via unknown vectors.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 32.0%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.
Description
Integer overflow in the MDC2_Update function in crypto/mdc2/mdc2dgst.c in OpenSSL before 1.1.0 allows remote attackers to cause a denial of service (out-of-bounds write and application crash) or possibly have unspecified other impact via unknown vectors.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 31.99% probability · 98th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- nodejs/node.js · openssl/openssl
- Source
- secalert@redhat.com
EPSS 32.0% since 4 November 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759Third Party Advisory
- http://www-01.ibm.com/support/docview.wss?uid=swg21995039Third Party Advisory
- http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.htmlPatch, Third Party Advisory
- http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.htmlPatch, Third Party Advisory
- http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.htmlPatch, Third Party Advisory
- http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.htmlPatch, Third Party Advisory
- http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.htmlPatch, Third Party Advisory
- http://www.securityfocus.com/bid/92984Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1036885Third Party Advisory, VDB Entry
- https://bto.bluecoat.com/security-advisory/sa132Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1370146Issue Tracking, Patch, Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
- https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=55d83bf7c10c7b205fffa23fa7c3977491e56c07
- https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA40312Third Party Advisory
- https://nodejs.org/en/blog/vulnerability/september-2016-security-releases/Third Party Advisory
- https://security.FreeBSD.org/advisories/FreeBSD-SA-16:26.openssl.ascThird Party Advisory
- https://www.tenable.com/security/tns-2016-16Third Party Advisory
- https://www.tenable.com/security/tns-2016-20Third Party Advisory
- https://www.tenable.com/security/tns-2016-21Third Party Advisory
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759Third Party Advisory
- http://www-01.ibm.com/support/docview.wss?uid=swg21995039Third Party Advisory
- http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.htmlPatch, Third Party Advisory
- http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.htmlPatch, Third Party Advisory
- http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.htmlPatch, Third Party Advisory
- http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.htmlPatch, Third Party Advisory
- http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.htmlPatch, Third Party Advisory
- http://www.securityfocus.com/bid/92984Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1036885Third Party Advisory, VDB Entry
- https://bto.bluecoat.com/security-advisory/sa132Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1370146Issue Tracking, Patch, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.