# CVE-2020-13645: glib-networking: In GNOME glib-networking through 2.64.2, the implementation of GTlsClientConnection skips hostname verification of th...

CVE-2020-13645 is fixed in 5 products on 1 platform, first by balsa 2.6.0-2ubuntu0.1, released May 28, 2020. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2020-13645
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0202
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 28, 2020

## Description

In GNOME glib-networking through 2.64.2, the implementation of GTlsClientConnection skips hostname verification of the server's TLS certificate if the application fails to specify the expected server identity. This is in contrast to its intended documented behavior, to fail the certificate verification. Applications that fail to provide the server identity, including Balsa before 2.5.11 and 2.6.x before 2.6.1, accept a TLS certificate if the certificate is valid for any host.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | balsa Ubuntu 20.04 LTS (focal) | 2.6.0-2ubuntu0.1 | [balsa 2.6.0-2ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-balsa-2.6.0-2ubuntu0.1.md) | May 28, 2020 |
| Linux | glib-networking Ubuntu 18.04.6 LTS (bionic) | 2.56.0-1ubuntu0.1 | [glib-networking 2.56.0-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-glib-networking-2.56.0-1ubuntu0.1.md) | May 28, 2020 |
| Linux | glib-networking Ubuntu 20.04 LTS (focal) | 2.64.2-1ubuntu0.1 | [glib-networking 2.64.2-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-glib-networking-2.64.2-1ubuntu0.1.md) | May 28, 2020 |
| Linux | glib-networking-common Ubuntu 18.04.6 LTS (bionic) | 2.56.0-1ubuntu0.1 | [glib-networking-common 2.56.0-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-glib-networking-common-2.56.0-1ubuntu0.1.md) | May 28, 2020 |
| Linux | glib-networking-common Ubuntu 20.04 LTS (focal) | 2.64.2-1ubuntu0.1 | [glib-networking-common 2.64.2-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-glib-networking-common-2.64.2-1ubuntu0.1.md) | May 28, 2020 |
| Linux | glib-networking-services Ubuntu 18.04.6 LTS (bionic) | 2.56.0-1ubuntu0.1 | [glib-networking-services 2.56.0-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-glib-networking-services-2.56.0-1ubuntu0.1.md) | May 28, 2020 |
| Linux | glib-networking-services Ubuntu 20.04 LTS (focal) | 2.64.2-1ubuntu0.1 | [glib-networking-services 2.64.2-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-glib-networking-services-2.64.2-1ubuntu0.1.md) | May 28, 2020 |
| Linux | glib-networking-tests Ubuntu 18.04.6 LTS (bionic) | 2.56.0-1ubuntu0.1 | [glib-networking-tests 2.56.0-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-glib-networking-tests-2.56.0-1ubuntu0.1.md) | May 28, 2020 |
| Linux | glib-networking-tests Ubuntu 20.04 LTS (focal) | 2.64.2-1ubuntu0.1 | [glib-networking-tests 2.64.2-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-glib-networking-tests-2.64.2-1ubuntu0.1.md) | May 28, 2020 |

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Data as of 2026-11-09T01:18:40Z 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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