# CVE-2018-12520: ntopng: An issue was discovered in ntopng 3.4 before 3.4.180617

CVE-2018-12520 is fixed in 2 products on 1 platform, first by ntopng 3.2+dfsg1-1ubuntu0.1~esm2, released July 5, 2018. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2018-12520
- Priority: High
- CVSS: n/a (High)
- EPSS: 0.1054
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 5, 2018

## Description

An issue was discovered in ntopng 3.4 before 3.4.180617. The PRNG involved in the generation of session IDs is not seeded at program startup. This results in deterministic session IDs being allocated for active user sessions. An attacker with foreknowledge of the operating system and standard library in use by the host running the service and the username of the user whose session they're targeting can abuse the deterministic random number generation in order to hijack the user's session, thus escalating their access.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | ntopng Ubuntu 18.04.6 LTS (bionic) | 3.2+dfsg1-1ubuntu0.1~esm2 | [ntopng 3.2+dfsg1-1ubuntu0.1~esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-ntopng-3.2-dfsg1-1ubuntu0.1-esm2.md) | Jul 5, 2018 |
| Linux | ntopng-data Ubuntu 18.04.6 LTS (bionic) | 3.2+dfsg1-1ubuntu0.1~esm2 | [ntopng-data 3.2+dfsg1-1ubuntu0.1~esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-ntopng-data-3.2-dfsg1-1ubuntu0.1-esm2.md) | Jul 5, 2018 |

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