Out-of-bounds Write Affecting libonig package, versions <6.3.0-1


medium

Snyk CVSS

    Attack Complexity Low
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    EPSS 0.81% (82nd percentile)
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NVD
9.8 critical
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Red Hat
5.9 medium

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  • Snyk ID SNYK-UBUNTU1804-LIBONIG-282502
  • published 24 May 2017
  • disclosed 24 May 2017

How to fix?

Upgrade Ubuntu:18.04 libonig to version 6.3.0-1 or higher.

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.

An issue was discovered in Oniguruma 6.2.0, as used in Oniguruma-mod in Ruby through 2.4.1 and mbstring in PHP through 7.1.5. A heap out-of-bounds write occurs in bitset_set_range() during regular expression compilation due to an uninitialized variable from an incorrect state transition. An incorrect state transition in parse_char_class() could create an execution path that leaves a critical local variable uninitialized until it's used as an index, resulting in an out-of-bounds write memory corruption.