CVE-2017-9229

Description

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 SIGSEGV occurs in left_adjust_char_head() during regular expression compilation. Invalid handling of reg->dmax in forward_search_range() could result in an invalid pointer dereference, normally as an immediate denial-of-service condition.

CVSS Metrics

• v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
• v2.0•MEDIUM•Score: 5AV:N/AC:L/Au:N/C:N/I:N/A:P

EPSS Trends

Current EPSS score: 0.35%• Percentile: 58%

Techniques & Countermeasures

• CWE-476•NULL Pointer Dereference

  The product dereferences a pointer that it expects to be valid but is NULL.

Affected Systems

• oniguruma_project•oniguruma

  6.2.0

• Unknown•PHP

  ≤ 7.1.5 | ≥ 5.6.0, < 5.6.31 | ≥ 7.0.0, < 7.0.21 | ≥ 7.1.0, < 7.1.7

• ruby-lang•ruby

  ≤ 2.4.1

References (3)

• https://github.com/kkos/oniguruma/commit/b690371bbf97794b4a1d3f295d4fb9a8b05d402d
• https://access.redhat.com/errata/RHSA-2018:1296
• https://github.com/kkos/oniguruma/issues/59