CVE-2017-3731

Truncated packet could crash via OOB read

Description

If an SSL/TLS server or client is running on a 32-bit host, and a specific cipher is being used, then a truncated packet can cause that server or client to perform an out-of-bounds read, usually resulting in a crash. For OpenSSL 1.1.0, the crash can be triggered when using CHACHA20/POLY1305; users should upgrade to 1.1.0d. For Openssl 1.0.2, the crash can be triggered when using RC4-MD5; users who have not disabled that algorithm should update to 1.0.2k.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 14.90% Top 10%
Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory FreeBSD.org Vendor Advisory gentoo.org Vendor Advisory debian.org Vendor Advisory redhat.com Vendor Advisory openssl.org
Affected: OpenSSL OpenSSL
Published at:
Updated at:

References

Link Tags
https://access.redhat.com/errata/RHSA-2018:2185 third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2018:2186 third party advisory vendor advisory
https://security.netapp.com/advisory/ntap-20171019-0002/ third party advisory
http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html third party advisory patch
http://www.securityfocus.com/bid/95813 vdb entry third party advisory
http://rhn.redhat.com/errata/RHSA-2017-0286.html third party advisory vendor advisory
https://security.FreeBSD.org/advisories/FreeBSD-SA-17:02.openssl.asc third party advisory vendor advisory
https://www.openssl.org/news/secadv/20170126.txt vendor advisory
http://www.securitytracker.com/id/1037717 vdb entry third party advisory
http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html third party advisory patch
https://www.tenable.com/security/tns-2017-04 third party advisory
https://source.android.com/security/bulletin/pixel/2017-11-01 third party advisory
https://security.gentoo.org/glsa/201702-07 third party advisory vendor advisory
http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html third party advisory patch
http://www.debian.org/security/2017/dsa-3773 third party advisory vendor advisory
https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03838en_us third party advisory
https://access.redhat.com/errata/RHSA-2018:2187 third party advisory vendor advisory
https://github.com/openssl/openssl/commit/00d965474b22b54e4275232bc71ee0c699c5cd21 third party advisory
https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html third party advisory patch
https://security.paloaltonetworks.com/CVE-2017-3731 third party advisory

Frequently Asked Questions

What is the severity of CVE-2017-3731?
CVE-2017-3731 has been scored as a high severity vulnerability.
How to fix CVE-2017-3731?
To fix CVE-2017-3731, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-3731 being actively exploited in the wild?
It is possible that CVE-2017-3731 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~15% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2017-3731?
CVE-2017-3731 affects OpenSSL OpenSSL.
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