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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.

Official description from the CVE record, published by openssl. Copyright © 1999-2026 The MITRE Corporation. See /security/cve/legal for the CVE license. View the record on cve.org

Key data

EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.
Score
0.57322 (57.3% probability)
Percentile
99.1%
Scores of
Nov 10, 2026
Model
v2026.06.15

Affected products

Products listed in the CVE record, as the CNA published them.

  • OpenSSL

    • 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

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

Timeline

  1. ID reserved
  2. Record published
  3. Record last updated

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Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:47 UTC. Sources and licenses