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Vulnerability of Oniguruma: denial of service via Regparse.c Recursion

Synthesis of the vulnerability

An attacker can trigger a fatal error via Regparse.c Recursion of Oniguruma, in order to trigger a denial of service.
Severity of this weakness: 2/4.
Creation date: 12/09/2019.
Références of this bulletin: bulletinoct2019, CVE-2019-16163, DLA-1918-1, FEDORA-2019-6a931c8eec, FEDORA-2019-e4819c6510, VIGILANCE-VUL-30324.

Description of the vulnerability

An attacker can trigger a fatal error via Regparse.c Recursion of Oniguruma, in order to trigger a denial of service.
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This computer vulnerability impacts software or systems such as Debian, Fedora, Solaris.

Our Vigil@nce team determined that the severity of this weakness bulletin is medium.

The trust level is of type confirmed by the editor, with an origin of document.

An attacker with a expert ability can exploit this weakness.

Solutions for this threat

Debian 8: new libonig packages.
New packages are available:
  Debian 8: libonig 5.9.5-3.2+deb8u3

Fedora: new oniguruma packages.
New packages are available:
  Fedora 29: oniguruma 6.9.1-3.fc29
  Fedora 30: oniguruma 6.9.2-3.fc30

Oracle Solaris: patch for third party software of October 2019 v1.
A patch is available:
  https://support.oracle.com/rs?type=doc&id=1448883.1
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