Vulnerability in libgit2 (DEBIAN-CVE-2018-10887)
Summary
Vulnerability in libgit2 (DEBIAN-CVE-2018-10887). Confidential information can be exposed externally. Mitigation: upgrade to 0.27.4+dfsg.1-0.1 or later.
Original description
The description as published by the source.
A flaw was found in libgit2 before version 0.27.3. It has been discovered that an unexpected sign extension in git_delta_apply function in delta.c file may lead to an integer overflow which in turn leads to an out of bound read, allowing to read before the base object. An attacker may use this flaw to leak memory addresses or cause a Denial of Service.
Source: OSV.dev (Open Source Vulnerabilities) OSV
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-2018-10887 has been found in libgit2.
Confidential information can be exposed externally.
What to do: upgrade libgit2 to 0.27.4+dfsg.1-0.1 or later.
If unsure, ask your IT team or search "libgit2 DEBIAN-CVE-2018-10887" on the vendor's site.
DEBIAN-CVE-2018-10887 (libgit2)
Attack vector: remote (network-reachable) / unauthenticated
Patched: 0.27.4+dfsg.1-0.1 — 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 libgit2.
Check the vendor advisory for the affected versions of libgit2.
Severity: ?. Confidential information can be exposed externally.
Update to 0.27.4+dfsg.1-0.1.
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 'libgit2' . 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
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1Identify exposure identify
grep -r 'libgit2' . | 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
libgit2を grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade libgit2 to 0.27.4+dfsg.1-0.1ステージング環境で 0.27.4+dfsg.1-0.1 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。
-
3Post-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。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- advisory security-tracker.debian.org