CVE-2017-18640

CWE-776 — XML Entity Expansion (Billion Laughs)CWE-122 — Heap-based Buffer Overflow12 documents10 sources
Severity
7.5HIGH
EPSS
2.2%
top 15.69%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
Snakeyaml Project SnakeyamlQuarkus QuarkusFedoraproject Fedora+1 more
Timeline
PublishedDec 12
Latest updateMar 27

Description

The Alias feature in SnakeYAML before 1.26 allows entity expansion during a load operation, a related issue to CVE-2003-1564.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages5 packages

▶Mavenorg.yaml:snakeyaml< 1.26
▶Debiansnakeyaml< 1.25+ds-3+3
▶NVDquarkus/quarkus1.3.4

Also affects: Fedora 31, 32

Patches

Patch: bitbucket.org ↗Patch: www.oracle.com ↗Patch: bitbucket.org ↗

🔴Vulnerability Details

4
OSV
SnakeYAML Entity Expansion during load operation↗2021-06-04
▶
GHSA
SnakeYAML Entity Expansion during load operation↗2021-06-04
▶
OSV
CVE-2017-18640: The Alias feature in SnakeYAML before 1↗2019-12-12
▶
CVEList
CVE-2017-18640: The Alias feature in SnakeYAML before 1↗2019-12-12
▶

📋Vendor Advisories

5
Ubuntu
SnakeYAML vulnerability↗2025-03-27
▶
Oracle
Oracle Oracle PeopleSoft Risk Matrix: Application Server (SnakeYAML) — CVE-2017-18640↗2021-04-15
▶
Red Hat
snakeyaml: Billion laughs attack via alias feature↗2019-12-12
▶
Microsoft
The Alias feature in SnakeYAML before 1.26 allows entity expansion during a load operation, a related issue to CVE-2003-1564.↗2019-12-10
▶
Debian
CVE-2017-18640: snakeyaml - The Alias feature in SnakeYAML before 1.26 allows entity expansion during a load...↗2017
▶

💬Community

2
Bugzilla
CVE-2017-18640 snakeyaml: Billion laughs attack via alias feature↗2019-12-19
▶
Bugzilla
CVE-2017-18640 snakeyaml: the alias feature allows entity expansion during a load operation [fedora-all]↗2019-12-19
▶
CVE-2017-18640 (HIGH CVSS 7.5) | The Alias feature in SnakeYAML befo | cvebase.io