# CVE-2020-8597: ppp: eap.c in pppd in ppp 2.4.2 through 2.4.8 has an rhostname buffer overflowin the eap_request and eap_response functions.

CVE-2020-8597 is fixed in 4 products on 1 platform, first by ppp 2.4.7-2+2ubuntu1.2, released February 3, 2020. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2020-8597
- Priority: High
- CVSS: 9.8 (Medium)
- EPSS: 0.1993
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 3, 2020

## Description

eap.c in pppd in ppp 2.4.2 through 2.4.8 has an rhostname buffer overflowin the eap_request and eap_response functions.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | liblwip0 Ubuntu 20.04 LTS (focal) | 2.1.2+dfsg1-4ubuntu0.1~esm1 | [liblwip0 2.1.2+dfsg1-4ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-liblwip0-2.1.2-dfsg1-4ubuntu0.1-esm1.md) | May 18, 2026 |
| Linux | network-scripts-ppp RHEL 8 | 0:2.4.7-26.el8_1 | [RHSA-2020:0633](https://patchblox.com/security/data/fix/linux/rhsa-2020-0633.md) | Feb 27, 2020 |
| Linux | ppp RHEL 8 | 0:2.4.7-26.el8_1 | [RHSA-2020:0633](https://patchblox.com/security/data/fix/linux/rhsa-2020-0633.md) | Feb 27, 2020 |
| Linux | ppp Ubuntu 18.04.6 LTS (bionic) | 2.4.7-2+2ubuntu1.2 | [ppp 2.4.7-2+2ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-ppp-2.4.7-2-2ubuntu1.2.md) | Feb 3, 2020 |
| Linux | ppp Ubuntu 20.04 LTS (focal) | 2.4.7-2+4.1ubuntu5 | [ppp 2.4.7-2+4.1ubuntu5](https://patchblox.com/security/data/fix/linux/ubuntu-focal-ppp-2.4.7-2-4.1ubuntu5.md) | Feb 3, 2020 |
| Linux | ppp Ubuntu 24.10 (oracular) | 2.4.7-2+4.1ubuntu5 | [ppp 2.4.7-2+4.1ubuntu5](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-ppp-2.4.7-2-4.1ubuntu5.md) | Jan 16, 2026 |
| Linux | ppp Ubuntu 25.04 (plucky) | 2.4.7-2+4.1ubuntu5 | [ppp 2.4.7-2+4.1ubuntu5](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-ppp-2.4.7-2-4.1ubuntu5.md) | Jan 16, 2026 |
| Linux | ppp ol 8 | 0:2.4.7-26.el8_1 | [ELSA-2020-0633](https://patchblox.com/security/data/fix/linux/elsa-2020-0633.md) | Feb 27, 2020 |
| Linux | ppp-devel RHEL 8 | 0:2.4.7-26.el8_1 | [RHSA-2020:0633](https://patchblox.com/security/data/fix/linux/rhsa-2020-0633.md) | Feb 27, 2020 |
| Linux | ppp-devel ol 8 | 0:2.4.7-26.el8_1 | [ELSA-2020-0633](https://patchblox.com/security/data/fix/linux/elsa-2020-0633.md) | Feb 27, 2020 |

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Data as of 2026-11-08T06:59:42Z 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

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