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UBUNTU-CVE-2023-4039
Vulnerability in gcc-4.7 (UBUNTU-CVE-2023-4039)
Summary
vulnerability in gcc-4.7 (UBUNTU-CVE-2023-4039). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to `10.5.0-1ubuntu1~20.04.1+esm1` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **UBUNTU-CVE-2023-4039** has been found in gcc-4.7.
Risk of unauthorized operations or information disclosure. CVSS score: ?/10.
What to do: upgrade gcc-4.7 to **10.5.0-1ubuntu1~20.04.1+esm1** or later.
If unsure, ask your IT team or search "gcc-4.7 UBUNTU-CVE-2023-4039" on the vendor's site.
UBUNTU-CVE-2023-4039 (gcc-4.7) —
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: `10.5.0-1ubuntu1~20.04.1+esm1` — 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.
❓ What is the problem
**A vulnerability** (unclassified) exists in gcc-4.7.
📍 Affected scope
gcc-4.7 — .
🔥 Severity
Severity: ?. Risk of unauthorized operations or information disclosure
🔧 How to fix
Update to **10.5.0-1ubuntu1~20.04.1+esm1**.
🛡️ Workaround
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
🔍 Detection
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run `grep -r 'gcc-4.7' .` against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response Actions (7 steps)
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'gcc-4.7' . | 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 `gcc-4.7` を grep し、稼働しているサービス・バージョンを把握する。
-
6Apply patch patch
Upgrade gcc-4.7 to 10.5.0-1ubuntu1~20.04.1+esm1ステージング環境で 10.5.0-1ubuntu1~20.04.1+esm1 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と、Step 3 で見つけた異常検知の続報チェックを含めること。
-
7Post-deployment verification verify
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 Step 3 と同じログクエリでアラート再発が無いか継続監視。
Affected packages
Ubuntu:14.04:LTS
gcc-4.7
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:14.04:LTS
gcc-4.8
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:14.04:LTS
gcc-mingw-w64
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:14.04:LTS
gccgo-4.9
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:Pro:16.04:LTS
gcc-5
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:16.04:LTS
gcc-5-cross
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:Pro:16.04:LTS
gccgo-6
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:16.04:LTS
gcc-4.7
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:16.04:LTS
gcc-4.7-armel-cross
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:16.04:LTS
gcc-4.7-armhf-cross
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:16.04:LTS
gcc-4.8
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:16.04:LTS
gcc-4.8-arm64-cross
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:16.04:LTS
gcc-4.8-armhf-cross
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:16.04:LTS
gcc-4.8-powerpc-cross
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:16.04:LTS
gcc-4.8-ppc64el-cross
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:16.04:LTS
gcc-4.9
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:16.04:LTS
gcc-4.9-cross
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:16.04:LTS
gcc-5-cross-ports
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:16.04:LTS
gcc-arm-linux-androideabi
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:16.04:LTS
gcc-arm-none-eabi
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:16.04:LTS
gcc-avr
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:16.04:LTS
gcc-h8300-hms
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:16.04:LTS
gcc-i686-linux-android
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:16.04:LTS
gcc-m68hc1x
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:16.04:LTS
gcc-mingw-w64
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:16.04:LTS
gcc-msp430
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:16.04:LTS
gcc-opt
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:16.04:LTS
gcc-snapshot
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:18.04:LTS
gcc-7
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:18.04:LTS
gcc-7-cross
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:18.04:LTS
gcc-8
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:18.04:LTS
gcc-8-cross
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:18.04:LTS
gcc-4.8
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:18.04:LTS
gcc-5
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:18.04:LTS
gcc-5-cross
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:18.04:LTS
gcc-5-cross-ports
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:18.04:LTS
gcc-6
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:18.04:LTS
gcc-6-cross
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:18.04:LTS
gcc-6-cross-ports
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:18.04:LTS
gcc-7-cross-ports
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:18.04:LTS
gcc-8-cross-ports
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:18.04:LTS
gcc-opt
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:18.04:LTS
gcc-snapshot
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:Pro:20.04:LTS
gcc-10
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"10.5.0-1ubuntu1~20.04.1+esm1"}]}]
Ubuntu:20.04:LTS
gcc-10-cross
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:Pro:20.04:LTS
gcc-9
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:Pro:20.04:LTS
gcc-9-cross
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:20.04:LTS
gcc-10-cross-ports
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:20.04:LTS
gcc-7
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:20.04:LTS
gcc-8
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:20.04:LTS
gcc-8-cross
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:20.04:LTS
gcc-8-cross-ports
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:20.04:LTS
gcc-9-cross-ports
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:20.04:LTS
gcc-opt
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:20.04:LTS
gcc-snapshot
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:22.04:LTS
gcc-10
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"10.5.0-1ubuntu1~22.04.2"}]}]
Ubuntu:22.04:LTS
gcc-10-cross
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:22.04:LTS
gcc-10-cross-ports
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:22.04:LTS
gcc-11
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"11.4.0-1ubuntu1~22.04.2"}]}]
Ubuntu:22.04:LTS
gcc-11-cross
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:22.04:LTS
gcc-11-cross-ports
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:22.04:LTS
gcc-12
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"12.3.0-1ubuntu1~22.04.2"}]}]
Ubuntu:22.04:LTS
gcc-12-cross
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:22.04:LTS
gcc-12-cross-ports
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:22.04:LTS
gcc-9
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:22.04:LTS
gcc-9-cross
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:22.04:LTS
gcc-9-cross-ports
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:22.04:LTS
gcc-opt
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:22.04:LTS
gcc-snapshot
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:24.04:LTS
gcc-10
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"10.5.0-4ubuntu2"}]}]
Ubuntu:24.04:LTS
gcc-10-cross
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"23ubuntu2"}]}]
Ubuntu:24.04:LTS
gcc-10-cross-ports
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:24.04:LTS
gcc-11
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"11.4.0-4ubuntu1"}]}]
Ubuntu:24.04:LTS
gcc-11-cross
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"21ubuntu2"}]}]
Ubuntu:24.04:LTS
gcc-11-cross-ports
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:24.04:LTS
gcc-12-cross
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"19ubuntu2"}]}]
Ubuntu:24.04:LTS
gcc-12-cross-ports
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:24.04:LTS
gcc-9
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.5.0-6ubuntu2"}]}]
Ubuntu:24.04:LTS
gcc-9-cross
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"29ubuntu2"}]}]
Ubuntu:24.04:LTS
gcc-9-cross-ports
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:24.04:LTS
gcc-opt
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:24.04:LTS
gcc-snapshot
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:25.10
gcc-11-cross-ports
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:25.10
gcc-12-cross-ports
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:25.10
gcc-opt
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:25.10
gcc-snapshot
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:26.04:LTS
gcc-11-cross-ports
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:26.04:LTS
gcc-12-cross-ports
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:26.04:LTS
gcc-opt
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:26.04:LTS
gcc-snapshot
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
References
- advisory https://ubuntu.com/security/notices/USN-7700-1
- report https://ubuntu.com/security/CVE-2023-4039
- report https://developer.arm.com/Arm%20Security%20Center/GCC%20Stack%20Protector%20Vulnerability%20AArch64
- report https://github.com/metaredteam/external-disclosures/security/advisories/GHSA-x7ch-h5rf-w2mf
- report https://rtx.meta.security/mitigation/2023/09/12/CVE-2023-4039.html
- report https://www.cve.org/CVERecord?id=CVE-2023-4039