Vulnerability in glib2.0
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as DEBIAN-CVE-2021-3800 has been found in glib2.0.
Confidential information can be exposed externally.
What to do: upgrade glib2.0 to 2.64.0-1 or later.
If unsure, ask your IT team or search "glib2.0 DEBIAN-CVE-2021-3800" on the vendor's site.
DEBIAN-CVE-2021-3800 (glib2.0)
Attack vector: local / unauthenticated
Patched: 2.64.0-1 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (unclassified) exists in glib2.0.
Check the vendor advisory for the affected versions of glib2.0.
Severity: ?. Confidential information can be exposed externally.
Update to 2.64.0-1.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'glib2.0' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1
Identify exposureidentify
grep -r 'glib2.0' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
glib2.0を grep し、稼働しているサービス・バージョンを把握する。 -
2
Apply patchpatch
Upgrade glib2.0 to 2.64.0-1ステージング環境で 2.64.0-1 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3
Post-deployment verificationverify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
| Ecosystem | Package | Affected | Fixed |
|---|---|---|---|
| Debian:12 | glib2.0 |
< 2.64.0-1 |
2.64.0-1 |
| Debian:13 | glib2.0 |
< 2.64.0-1 |
2.64.0-1 |
| Debian:14 | glib2.0 |
< 2.64.0-1 |
2.64.0-1 |
Original description The description as published by the source.
A flaw was found in glib before version 2.63.6. Due to random charset alias, pkexec can leak content from files owned by privileged users to unprivileged ones under the right condition.
Source: OSV.dev (Open Source Vulnerabilities) OSV
References
- advisory security-tracker.debian.org