Use After Free Affecting libonig package, versions *


medium

Snyk CVSS

    Attack Complexity Low
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    EPSS 1.22% (85th percentile)
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NVD
9.8 critical
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SUSE
6.6 medium
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Red Hat
6.8 medium

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  • Snyk ID SNYK-UBUNTU1804-LIBONIG-453256
  • published 24 Jul 2019
  • disclosed 10 Jul 2019

How to fix?

There is no fixed version for Ubuntu:18.04 libonig.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libonig package and not the libonig package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

A use-after-free in onig_new_deluxe() in regext.c in Oniguruma 6.9.2 allows attackers to potentially cause information disclosure, denial of service, or possibly code execution by providing a crafted regular expression. The attacker provides a pair of a regex pattern and a string, with a multi-byte encoding that gets handled by onig_new_deluxe(). Oniguruma issues often affect Ruby, as well as common optional libraries for PHP and Rust.