CVE-2017-18640

Public Exploit

Description

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

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 2.17% Top 20%
Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory gentoo.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CKN7VGIKTYBCAKYBRG55QHXAY5UDZ7HA/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PTVJC54XGX26UJVVYCXZ7D25X3R5T2G6/ vendor advisory
https://lists.apache.org/thread.html/r8b57c57cffa01e418868a3c7535b987635ff1fb5ab534203bfa2d64a%40%3Ccommits.pulsar.apache.org%3E mailing list
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https://lists.apache.org/thread.html/r8464b6ec951aace8c807bac9ea526d4f9e3116aa16d38be06f7c6524%40%3Ccommon-issues.hadoop.apache.org%3E mailing list
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https://lists.apache.org/thread.html/r6c91e52b3cc9f4e64afe0f34f20507143fd1f756d12681a56a9b38da%40%3Ccommits.pulsar.apache.org%3E mailing list
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https://lists.apache.org/thread.html/rb0e033d5ec8233360203431ad96580cf2ec56f47d9a425d894e279c2%40%3Cpr.cassandra.apache.org%3E mailing list
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https://lists.apache.org/thread.html/r2db207a2431a5e9e95e899858ab1f5eabd9bcc790a6ca7193ae07e94%40%3Cdev.atlas.apache.org%3E mailing list
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https://lists.apache.org/thread.html/r56805265475919252ba7fc10123f15b91097f3009bae86476624ca25%40%3Ccommits.cassandra.apache.org%3E mailing list
https://lists.apache.org/thread.html/rbaa1f513d903c89a08267c91d86811fa5bcc82e0596b6142c5cea7ea%40%3Ccommits.cassandra.apache.org%3E mailing list
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https://lists.apache.org/thread.html/r1703a402f30c8a2ee409f8c6f393e95a63f8c952cc9ee5bf9dd586dc%40%3Ccommits.cassandra.apache.org%3E mailing list
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https://lists.apache.org/thread.html/r436988d2cfe8a770ae361c82b181c5b2bf48a249bad84d8a55a3b46e%40%3Cdev.phoenix.apache.org%3E mailing list
https://lists.apache.org/thread.html/r7ce3de03facf7e7f3e24fc25d26d555818519dafdb20f29398a3414b%40%3Cdev.phoenix.apache.org%3E mailing list
https://www.oracle.com/security-alerts/cpuApr2021.html third party advisory patch
https://bitbucket.org/asomov/snakeyaml/issues/377/allow-configuration-for-preventing-billion issue tracking patch exploit third party advisory
https://mvnrepository.com/artifact/org.yaml/snakeyaml/1.25/usages third party advisory
https://bitbucket.org/asomov/snakeyaml/wiki/Billion%20laughs%20attack third party advisory
https://lists.apache.org/thread.html/r4c682fb8cf69dd14162439656a6ebdf42ea6ad0e4edba95907ea3f14%40%3Ccommits.servicecomb.apache.org%3E
https://lists.apache.org/thread.html/r900e020760c89f082df1c6e0d46320eba721e4e47bb9eb521e68cd95%40%3Ccommits.servicecomb.apache.org%3E
https://lists.apache.org/thread.html/r2721aba31a8562639c4b937150897e24f78f747cdbda8641c0f659fe%40%3Cusers.kafka.apache.org%3E mailing list
https://lists.apache.org/thread.html/r16ae4e529401b75a1f5aa462b272b31bf2a108236f882f06fddc14bc%40%3Ccommon-issues.hadoop.apache.org%3E mailing list
https://lists.apache.org/thread.html/rfe0aab6c3bebbd9cbfdedb65ff3fdf420714bcb8acdfd346077e1263%40%3Ccommon-commits.hadoop.apache.org%3E mailing list
https://lists.apache.org/thread.html/r182e9cf6f3fb22b9be0cac4ff0685199741d2ab6e9a4e27a3693c224%40%3Ccommon-issues.hadoop.apache.org%3E mailing list
https://lists.apache.org/thread.html/rdd34c0479587e32a656d976649409487d51ca0d296b3e26b6b89c3f5%40%3Ccommon-commits.hadoop.apache.org%3E mailing list
https://lists.apache.org/thread.html/r465d2553a31265b042cf5457ef649b71e0722ab89b6ea94a5d59529b%40%3Ccommon-issues.hadoop.apache.org%3E mailing list
https://bitbucket.org/snakeyaml/snakeyaml/wiki/Changes third party advisory release notes
https://bitbucket.org/snakeyaml/snakeyaml/issues/377 issue tracking exploit third party advisory
https://security.gentoo.org/glsa/202305-28 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2017-18640?
CVE-2017-18640 has been scored as a high severity vulnerability.
How to fix CVE-2017-18640?
To fix CVE-2017-18640, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-18640 being actively exploited in the wild?
It is possible that CVE-2017-18640 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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