Vulnerability in owslib (UBUNTU-CVE-2023-27476)
Summary
Vulnerability in owslib (UBUNTU-CVE-2023-27476). Confidential information can be exposed externally. Exploitable via lxml. Mitigation: upgrade to 0.16.0-1ubuntu0.1~esm1 or later.
Original description
The description as published by the source.
OWSLib is a Python package for client programming with Open Geospatial Consortium (OGC) web service interface standards, and their related content models. OWSLib's XML parser (which supports both lxml and xml.etree) does not disable entity resolution, and could lead to arbitrary file reads from an attacker-controlled XML payload. This affects all XML parsing in the codebase. This issue has been addressed in version 0.28.1. All users are advised to upgrade. The only known workaround is to patch the library manually. See GHSA-8h9c-r582-mggc for details.
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 UBUNTU-CVE-2023-27476 has been found in owslib.
Attackers can target a specific entry point like lxml over the network to misuse the product.
Confidential information can be exposed externally.
What to do: upgrade owslib to 0.16.0-1ubuntu0.1~esm1 or later.
If unsure, ask your IT team or search "owslib UBUNTU-CVE-2023-27476" on the vendor's site.
UBUNTU-CVE-2023-27476 (owslib)
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Attack surface: lxml / xml.etree
Patched: 0.16.0-1ubuntu0.1~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.
A vulnerability (unclassified) exists in owslib. Attackers reach the vulnerable code path via lxml without authentication.
Check the vendor advisory for the affected versions of owslib. Attack surface: lxml / xml.etree.
Severity: ?. Confidential information can be exposed externally.
Update to 0.16.0-1ubuntu0.1~esm1.
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 'owslib' . 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 'owslib' . | 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
owslib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 owslib to 0.16.0-1ubuntu0.1~esm1ステージング環境で 0.16.0-1ubuntu0.1~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 ubuntu.com
- report ubuntu.com
- report github.com
- report github.com
- report securitylab.github.com
- report cve.org