# CVE-2017-3735: libssl1.0.0: While parsing an IPAddressFamily extension in an X.509 certificate, it is possible to do a one-byte overread

CVE-2017-3735 is fixed in 2 products on 1 platform, first by libssl1.0.0 1.0.2g-1ubuntu14, released November 1, 2017. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2017-3735
- Priority: Routine
- CVSS: n/a (Low)
- EPSS: 0.2097
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 27, 2017

## Description

While parsing an IPAddressFamily extension in an X.509 certificate, it is possible to do a one-byte overread. This would result in an incorrect text display of the certificate. This bug has been present since 2006 and is present in all versions of OpenSSL before 1.0.2m and 1.1.0g.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libssl1.0.0 Ubuntu 18.04.6 LTS (bionic) | 1.0.2g-1ubuntu14 | [libssl1.0.0 1.0.2g-1ubuntu14](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libssl1.0.0-1.0.2g-1ubuntu14.md) | Nov 1, 2017 |
| Linux | openssl Ubuntu 18.04.6 LTS (bionic) | 1.0.2g-1ubuntu14 | [openssl 1.0.2g-1ubuntu14](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-openssl-1.0.2g-1ubuntu14.md) | Nov 1, 2017 |

---

Data as of 2026-11-07T06:34:28Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo