# CVE-2021-3800: glib2: GLib provides the core application building blocks for libraries and applications written in C

CVE-2021-3800 is fixed in 12 products on 1 platform, first by libglib2.0-0 2.56.4-0ubuntu0.18.04.9, released November 1, 2021. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2021-3800
- Priority: High
- CVSS: 7.5 (Moderate)
- EPSS: 0.0057
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Nov 1, 2021

## Description

GLib provides the core application building blocks for libraries and applications written in C. It provides the core object system used in GNOME, the main loop implementation, and a large set of utility functions for strings and common data structures.  Security Fix(es):  * glib2: Possible privilege escalation thourgh pkexec and aliases (CVE-2021-3800)  * glib: g_file_replace() with G_FILE_CREATE_REPLACE_DESTINATION creates empty target for dangling symlink (CVE-2021-28153)  For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.  Additional Changes:  For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.5 Release Notes linked from the References section.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | glib2 RHEL 8 | 0:2.56.4-156.el8 | [RHSA-2021:4385](https://patchblox.com/security/data/fix/linux/rhsa-2021-4385.md) | Nov 9, 2021 |
| Linux | glib2 ol 8 | 0:2.56.4-156.el8 | [ELSA-2021-4385](https://patchblox.com/security/data/fix/linux/elsa-2021-4385.md) | Nov 16, 2021 |
| Linux | glib2-devel RHEL 8 | 0:2.56.4-156.el8 | [RHSA-2021:4385](https://patchblox.com/security/data/fix/linux/rhsa-2021-4385.md) | Nov 9, 2021 |
| Linux | glib2-devel ol 8 | 0:2.56.4-156.el8 | [ELSA-2021-4385](https://patchblox.com/security/data/fix/linux/elsa-2021-4385.md) | Nov 16, 2021 |
| Linux | glib2-doc RHEL 8 | 0:2.56.4-156.el8 | [RHSA-2021:4385](https://patchblox.com/security/data/fix/linux/rhsa-2021-4385.md) | Nov 9, 2021 |
| Linux | glib2-doc ol 8 | 0:2.56.4-156.el8 | [ELSA-2021-4385](https://patchblox.com/security/data/fix/linux/elsa-2021-4385.md) | Nov 16, 2021 |
| Linux | glib2-fam RHEL 8 | 0:2.56.4-156.el8 | [RHSA-2021:4385](https://patchblox.com/security/data/fix/linux/rhsa-2021-4385.md) | Nov 9, 2021 |
| Linux | glib2-fam ol 8 | 0:2.56.4-156.el8 | [ELSA-2021-4385](https://patchblox.com/security/data/fix/linux/elsa-2021-4385.md) | Nov 16, 2021 |
| Linux | glib2-static RHEL 8 | 0:2.56.4-156.el8 | [RHSA-2021:4385](https://patchblox.com/security/data/fix/linux/rhsa-2021-4385.md) | Nov 9, 2021 |
| Linux | glib2-static ol 8 | 0:2.56.4-156.el8 | [ELSA-2021-4385](https://patchblox.com/security/data/fix/linux/elsa-2021-4385.md) | Nov 16, 2021 |
| Linux | glib2-tests RHEL 8 | 0:2.56.4-156.el8 | [RHSA-2021:4385](https://patchblox.com/security/data/fix/linux/rhsa-2021-4385.md) | Nov 9, 2021 |
| Linux | glib2-tests ol 8 | 0:2.56.4-156.el8 | [ELSA-2021-4385](https://patchblox.com/security/data/fix/linux/elsa-2021-4385.md) | Nov 16, 2021 |
| Linux | glib2.0 Debian 12.15 (bookworm) | 2.64.0-1 | [DEBIAN-CVE-2021-3800](https://patchblox.com/security/data/fix/linux/debian-cve-2021-3800.md) | Aug 23, 2022 |
| Linux | glib2.0 Debian 13.5 (trixie) | 2.64.0-1 | [DEBIAN-CVE-2021-3800](https://patchblox.com/security/data/fix/linux/debian-cve-2021-3800.md) | Aug 23, 2022 |
| Linux | glib2.0 Debian 14 | 2.64.0-1 | [DEBIAN-CVE-2021-3800](https://patchblox.com/security/data/fix/linux/debian-cve-2021-3800.md) | Aug 23, 2022 |
| Linux | libglib2.0-0 Ubuntu 18.04.6 LTS (bionic) | 2.56.4-0ubuntu0.18.04.9 | [libglib2.0-0 2.56.4-0ubuntu0.18.04.9](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libglib2.0-0-2.56.4-0ubuntu0.18.04.9.md) | Nov 1, 2021 |
| Linux | libglib2.0-bin Ubuntu 18.04.6 LTS (bionic) | 2.56.4-0ubuntu0.18.04.9 | [libglib2.0-bin 2.56.4-0ubuntu0.18.04.9](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libglib2.0-bin-2.56.4-0ubuntu0.18.04.9.md) | Nov 1, 2021 |
| Linux | libglib2.0-data Ubuntu 18.04.6 LTS (bionic) | 2.56.4-0ubuntu0.18.04.9 | [libglib2.0-data 2.56.4-0ubuntu0.18.04.9](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libglib2.0-data-2.56.4-0ubuntu0.18.04.9.md) | Nov 1, 2021 |
| Linux | libglib2.0-dev-bin Ubuntu 18.04.6 LTS (bionic) | 2.56.4-0ubuntu0.18.04.9 | [libglib2.0-dev-bin 2.56.4-0ubuntu0.18.04.9](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libglib2.0-dev-bin-2.56.4-0ubuntu0.18.04.9.md) | Nov 1, 2021 |
| Linux | libglib2.0-tests Ubuntu 18.04.6 LTS (bionic) | 2.56.4-0ubuntu0.18.04.9 | [libglib2.0-tests 2.56.4-0ubuntu0.18.04.9](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libglib2.0-tests-2.56.4-0ubuntu0.18.04.9.md) | Nov 1, 2021 |

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