Heap-based Buffer Overflow Affecting rubygem-psych package, versions <0:2.0.0-33.el7_4
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RHEL7-RUBYGEMPSYCH-4804072
- published26 Jul 2021
- disclosed14 Sept 2017
Introduced: 14 Sep 2017
CVE-2017-0898 (opens in a new tab)How to fix?
Upgrade RHEL:7 rubygem-psych to version 0:2.0.0-33.el7_4 or higher.
This issue was patched in RHSA-2018:0378.
NVD Description
Note: Versions mentioned in the description apply only to the upstream rubygem-psych package and not the rubygem-psych package as distributed by RHEL.
See How to fix? for RHEL:7 relevant fixed versions and status.
Ruby before 2.4.2, 2.3.5, and 2.2.8 is vulnerable to a malicious format string which contains a precious specifier (*) with a huge minus value. Such situation can lead to a buffer overrun, resulting in a heap memory corruption or an information disclosure from the heap.
References
- http://www.securityfocus.com/bid/100862
- https://access.redhat.com/security/cve/CVE-2017-0898
- https://www.debian.org/security/2017/dsa-4031
- https://security.gentoo.org/glsa/201710-18
- https://github.com/mruby/mruby/issues/3722
- https://hackerone.com/reports/212241
- https://www.ruby-lang.org/en/news/2017/09/14/sprintf-buffer-underrun-cve-2017-0898/
- https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html
- https://access.redhat.com/errata/RHSA-2018:0378
- http://www.securitytracker.com/id/1039363
- https://usn.ubuntu.com/3685-1/