Vulnerability in exim4
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-2019-13917 has been found in exim4.
Successful exploitation can lead to full system takeover.
What to do: upgrade exim4 to 4.92.1 or later.
If unsure, ask your IT team or search "exim4 DEBIAN-CVE-2019-13917" on the vendor's site.
DEBIAN-CVE-2019-13917 (exim4)
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: 4.92.1 — 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 exim4.
Check the vendor advisory for the affected versions of exim4.
Severity: ?. Successful exploitation can lead to full system takeover.
Update to 4.92.1.
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 'exim4' . 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 'exim4' . | 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
exim4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 exim4 to 4.92.1ステージング環境で 4.92.1 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 | exim4 |
< 4.92-10 |
4.92-10 |
| Debian:13 | exim4 |
< 4.92-10 |
4.92-10 |
| Debian:14 | exim4 |
< 4.92-10 |
4.92-10 |
Original description The description as published by the source.
Exim 4.85 through 4.92 (fixed in 4.92.1) allows remote code execution as root in some unusual configurations that use the ${sort } expansion for items that can be controlled by an attacker (e.g., $local_part or $domain).
Source: OSV.dev (Open Source Vulnerabilities) OSV
References
- advisory security-tracker.debian.org