critical
CVE-2016-6303
openssl: Integer overflow in MDC2_Update()
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.
Severity by source
NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Red Hat6.5CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Trivy's own label is CRITICAL. Rated critical by NVD. Rated lower by Red Hat (medium), Ubuntu (medium).
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.
Affected packages and fixed versions
| Source | Package | Fixed in |
|---|---|---|
| alpine 3.2 | openssl | 1.0.2h-r3 |
| alpine 3.3 | openssl | 1.0.2h-r3 |
| alpine 3.4 | openssl | 1.0.2h-r3 |
| alpine 3.5 | openssl | 1.0.2h-r3 |
| alpine 3.6 | openssl | 1.0.2h-r3 |
| alpine 3.7 | openssl | 1.0.2h-r3 |
| alpine 3.8 | openssl | 1.0.2h-r3 |
| debian 11 | openssl | 1.0.2i-1 |
| debian 12 | openssl | 1.0.2i-1 |
| debian 13 | openssl | 1.0.2i-1 |
| debian 14 | openssl | 1.0.2i-1 |
| debian 7 | openssl | 1.0.1t-1+deb7u1 |
Show all 28 entries from 28 sources
| Source | Package | Fixed in |
|---|---|---|
| alpine 3.2 | openssl | 1.0.2h-r3 |
| alpine 3.3 | openssl | 1.0.2h-r3 |
| alpine 3.4 | openssl | 1.0.2h-r3 |
| alpine 3.5 | openssl | 1.0.2h-r3 |
| alpine 3.6 | openssl | 1.0.2h-r3 |
| alpine 3.7 | openssl | 1.0.2h-r3 |
| alpine 3.8 | openssl | 1.0.2h-r3 |
| debian 11 | openssl | 1.0.2i-1 |
| debian 12 | openssl | 1.0.2i-1 |
| debian 13 | openssl | 1.0.2i-1 |
| debian 14 | openssl | 1.0.2i-1 |
| debian 7 | openssl | 1.0.1t-1+deb7u1 |
| debian 8 | openssl | 1.0.1t-1+deb8u4 |
| echo | openssl | 1.0.2i-1 |
| root.io debian 11 | rootio-openssl | 1.0.2i-1 |
| root.io debian 12 | rootio-openssl | 1.0.2i-1 |
| ubuntu 12.04 | openssl | 1.0.1-4ubuntu5.37 |
| ubuntu 14.04 | openssl | 1.0.1f-1ubuntu2.20 |
| ubuntu 14.04-ESM | openssl | 1.0.1f-1ubuntu2.20 |
| ubuntu 16.04 | openssl | 1.0.2g-1ubuntu4.4 |
| ubuntu 16.04-ESM | openssl | 1.0.2g-1ubuntu4.4 |
| ubuntu 16.10 | openssl | 1.0.2g-1ubuntu9 |
| ubuntu 17.04 | openssl | 1.0.2g-1ubuntu9 |
| ubuntu 17.10 | openssl | 1.0.2g-1ubuntu9 |
| ubuntu 18.04 | openssl | 1.0.2g-1ubuntu9 |
| ubuntu 18.04-ESM | openssl | 1.0.2g-1ubuntu9 |
| ubuntu 18.10 | openssl | 1.0.2g-1ubuntu9 |
| ubuntu 19.04 | openssl | 1.0.2g-1ubuntu9 |
References
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759
- http://www-01.ibm.com/support/docview.wss?uid=swg21995039
- http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html
- http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
- http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html
- http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html
- http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
- http://www.securityfocus.com/bid/92984
All 24 references
- http://www.securitytracker.com/id/1036885
- https://access.redhat.com/security/cve/CVE-2016-6303
- https://bto.bluecoat.com/security-advisory/sa132
- https://bugzilla.redhat.com/show_bug.cgi?id=1370146
- 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/SA40312
- https://nodejs.org/en/blog/vulnerability/september-2016-security-releases/
- https://nvd.nist.gov/vuln/detail/CVE-2016-6303
- https://security.freebsd.org/advisories/FreeBSD-SA-16:26.openssl.asc
- https://ubuntu.com/security/notices/USN-3087-1
- https://www.cve.org/CVERecord?id=CVE-2016-6303
- https://www.openssl.org/news/secadv/20160922.txt
- https://www.tenable.com/security/tns-2016-16
- https://www.tenable.com/security/tns-2016-20
- https://www.tenable.com/security/tns-2016-21