CVE-2017-9227

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 stack out-of-bounds read occurs in mbc_enc_len() during regular expression searching. Invalid handling of reg->dmin in forward_search_range() could result in an invalid pointer dereference, as an out-of-bounds read from a stack buffer.

CVSS Metrics

• v3.1•CRITICAL•Score: 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
• v2.0•HIGH•Score: 7.5AV:N/AC:L/Au:N/C:P/I:P/A:P

EPSS Trends

Current EPSS score: 0.45%• Percentile: 64%

Techniques & Countermeasures

• CWE-125•Out-of-bounds Read

  The product reads data past the end, or before the beginning, of the intended buffer.

Affected Systems

• oniguruma_project•oniguruma

  6.2.0

• Unknown•PHP

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

References (4)

• https://access.redhat.com/errata/RHSA-2018:1296
• http://www.securityfocus.com/bid/100538
• https://github.com/kkos/oniguruma/issues/58
• https://github.com/kkos/oniguruma/commit/9690d3ab1f9bcd2db8cbe1fe3ee4a5da606b8814