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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | glib-networking | 2.64.3-2 | — |
| Debian 13 | glib-networking | 2.64.3-2 | — |
| Debian 12 | glib-networking | 2.64.3-2 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | balsa | 2.6.0-2ubuntu0.1 | — |
| Ubuntu 20.04 LTS | glib-networking | 2.64.2-1ubuntu0.1 | USN-4405-1 |
| Ubuntu 18.04 LTS | glib-networking | 2.56.0-1ubuntu0.1 | USN-4405-1 |
| Ubuntu 16.04 LTS | glib-networking | 2.48.2-1~ubuntu16.04.2 | USN-4405-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | glib-networking | 2.62.4-3.3.1 | SUSE-SU-2021:3944-1 |
| SLES 15 SP2 | glib-networking | 2.62.4-3.3.1 | SUSE-SU-2021:3944-1 |
| SLES 15 SP1 | glib-networking | 2.54.1-3.6.1 | SUSE-SU-2021:3997-1 |
| SLES 15 | glib-networking | 2.54.1-3.6.1 | SUSE-SU-2021:3997-1 |
| SLES 12 SP5 | glib-networking | 2.48.2-6.3.1 | SUSE-SU-2021:4004-1 |
Show 20 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP4 | glib-networking | 2.48.2-6.3.1 | SUSE-SU-2021:4004-1 |
| SLES 12 SP3 | glib-networking | 2.48.2-6.3.1 | SUSE-SU-2021:4004-1 |
| SLES 12 SP2 | glib-networking | 2.48.2-6.3.1 | SUSE-SU-2021:4004-1 |
| SLES for SAP 15 SP1 | glib-networking | 2.54.1-3.6.1 | SUSE-SU-2021:3997-1 |
| SLES for SAP 15 | glib-networking | 2.54.1-3.6.1 | SUSE-SU-2021:3997-1 |
| SLES for SAP 12 SP5 | glib-networking | 2.48.2-6.3.1 | SUSE-SU-2021:4004-1 |
| SLES for SAP 12 SP4 | glib-networking | 2.48.2-6.3.1 | SUSE-SU-2021:4004-1 |
| SLES for SAP 12 SP3 | glib-networking | 2.48.2-6.3.1 | SUSE-SU-2021:4004-1 |
| SLE Micro 5.1 | glib-networking | 2.62.4-3.3.1 | SUSE-SU-2021:3944-1 |
| SLE Micro 5.0 | glib-networking | 2.62.4-3.3.1 | SUSE-SU-2021:3944-1 |
| SLE HPC 15 SP1 | glib-networking | 2.54.1-3.6.1 | SUSE-SU-2021:3997-1 |
| SLE HPC 15 | glib-networking | 2.54.1-3.6.1 | SUSE-SU-2021:3997-1 |
| SUSE Package Hub 15 SP3 | balsa | 2.6.1-bp153.2.3.1 | openSUSE-SU-2021:1094-1 |
| SUSE Package Hub 15 SP2 | balsa | 2.6.1-bp153.2.3.1 | openSUSE-SU-2021:1094-1 |
| SUSE OpenStack Cloud Crowbar 9 | glib-networking | 2.48.2-6.3.1 | SUSE-SU-2021:4004-1 |
| SUSE OpenStack Cloud Crowbar 8 | glib-networking | 2.48.2-6.3.1 | SUSE-SU-2021:4004-1 |
| SUSE OpenStack Cloud 9 | glib-networking | 2.48.2-6.3.1 | SUSE-SU-2021:4004-1 |
| SUSE OpenStack Cloud 8 | glib-networking | 2.48.2-6.3.1 | SUSE-SU-2021:4004-1 |
| SUSE HPE Helion OpenStack 8 | glib-networking | 2.48.2-6.3.1 | SUSE-SU-2021:4004-1 |
| SUSE Enterprise Storage 6 | glib-networking | 2.54.1-3.6.1 | SUSE-SU-2021:3997-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | glib-networking | 2.68.1-1.3 | openSUSE-SU-2024:10790-1 |
| openSUSE Leap 15.3 | balsa | 2.6.1-bp153.2.3.1 | openSUSE-SU-2021:1094-1 |
| openSUSE Leap 15.3 | glib-networking | 2.62.4-3.3.1 | openSUSE-SU-2021:3944-1 |
| openSUSE Leap 15.2 | balsa | 2.6.1-bp153.2.3.1 | openSUSE-SU-2021:1094-1 |
| openSUSE Leap 15.2 | glib-networking | 2.62.4-lp152.2.3.1 | openSUSE-SU-2021:1554-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | glib-networking | 2.64.3-r0 | — |
| Alpine v3.23 | glib-networking | 2.64.3-r0 | — |
| Alpine v3.22 | glib-networking | 2.64.3-r0 | — |
| Alpine v3.21 | glib-networking | 2.64.3-r0 | — |
| Alpine v3.20 | glib-networking | 2.64.3-r0 | — |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | glib-networking | 2.64.3-r0 | — |
| Alpine v3.18 | glib-networking | 2.64.3-r0 | — |
| Alpine v3.17 | glib-networking | 2.64.3-r0 | — |
| Alpine v3.16 | glib-networking | 2.64.3-r0 | — |
| Alpine v3.15 | glib-networking | 2.64.3-r0 | — |
| Alpine v3.14 | glib-networking | 2.64.3-r0 | — |
| Alpine v3.13 | glib-networking | 2.64.3-r0 | — |
| Alpine v3.12 | glib-networking | 2.64.3-r0 | — |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | glib-networking | 2.59.1-8 | — |
Advisories 9
- WID-SEC-2026-0778 Dell Secure Connect Gateway Policy Manager: Mehrere Schwachstellen BSI CERT-Bund (WID) · May 11, 2026
- USN-4405-1 glib-networking vulnerability Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2021:3997-1 Security update for glib-networking SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3944-1 Security update for glib-networking SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:3944-1 Security update for glib-networking SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:1554-1 Security update for glib-networking SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:4004-1 Security update for glib-networking SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10790-1 glib-networking-2.68.1-1.3 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:1094-1 Security update for balsa SUSE / openSUSE Security Updates · Feb 4, 2026
References
- https://gitlab.gnome.org/GNOME/glib-networking/-/issues/135
- https://gitlab.gnome.org/GNOME/balsa/-/issues/34
- https://security.netapp.com/advisory/ntap-20200608-0004/
- FEDORA-2020-98ebbd1397 vendor-advisory
- FEDORA-2020-cadbc5992f vendor-advisory
- FEDORA-2020-a83c8cd358 vendor-advisory
- USN-4405-1 vendor-advisory
- GLSA-202007-50 vendor-advisory