- 7.5HighCVSS base score
- 57.3%Exploitation in 30 daysEPSS · top 0.9% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By openssl
- 5 months later
· 5 months later
Published
- 7 years later
· 7 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 57.3% · top 0.9% of all CVEs (9 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
- affected openssl-1.1.0
- affected openssl-1.1.0a
- affected openssl-1.1.0b
- affected openssl-1.1.0c
- affected openssl-1.0.2
- affected openssl-1.0.2a
- affected openssl-1.0.2b
- affected openssl-1.0.2c
- affected openssl-1.0.2d
- affected openssl-1.0.2e
- affected openssl-1.0.2f
- affected openssl-1.0.2g
- affected openssl-1.0.2h
- affected openssl-1.0.2i
- affected openssl-1.0.2j
References
20
- RHSA-2018:2185 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2018:2186 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- https://security.netapp.com/advisory/ntap-20171019-0002/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- 95813 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- RHSA-2017:0286 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- FreeBSD-SA-17:02 (opens in a new tab)vendor-advisoryx_refsource_FREEBSDx_transferred
- https://www.openssl.org/news/secadv/20170126.txt (opens in a new tab)x_refsource_CONFIRMx_transferred
- 1037717 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://www.tenable.com/security/tns-2017-04 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://source.android.com/security/bulletin/pixel/2017-11-01 (opens in a new tab)x_refsource_CONFIRMx_transferred
- GLSA-201702-07 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- DSA-3773 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03838en_us (opens in a new tab)x_refsource_CONFIRMx_transferred
- RHSA-2018:2187 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- https://github.com/openssl/openssl/commit/00d965474b22b54e4275232bc71ee0c699c5cd21 (opens in a new tab)x_refsource_MISCx_transferred
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html (opens in a new tab)x_refsource_MISCx_transferred
- https://security.paloaltonetworks.com/CVE-2017-3731 (opens in a new tab)x_refsource_CONFIRMx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2017-12848 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2017-3731)Record last updated .