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Synthesis of the vulnerability 
An attacker can trigger a buffer overflow via concat_opt_exact_str() of Oniguruma, in order to trigger a denial of service, and possibly to run code.
Impacted products: Debian, Fedora, Solaris.
Severity of this bulletin: 2/4.
Creation date: 09/10/2020.
Références of this threat: CVE-2020-26159, FEDORA-2020-952c499e9d, FEDORA-2020-d53469eceb, VIGILANCE-VUL-33531.
Description of the vulnerability 
An attacker can trigger a buffer overflow via concat_opt_exact_str() of Oniguruma, in order to trigger a denial of service, and possibly to run code. Full bulletin, software filtering, emails, fixes, ... (Request your free trial)
This computer weakness alert impacts software or systems such as Debian, Fedora, Solaris.
Our Vigil@nce team determined that the severity of this weakness note 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 bulletin.
Solutions for this threat 
Debian 9: new libonig packages.
New packages are available:
Debian 9: libonig 6.1.3-2+deb9u1
Fedora: new oniguruma packages.
New packages are available:
Fedora 31: oniguruma 6.9.4-2.fc31
Fedora 32: oniguruma 6.9.5-3.rev1.fc32
Oracle Solaris: patch for third party software of October 2020 v3.
A patch is available:
https://support.oracle.com/rs?type=doc&id=1448883.1
Full bulletin, software filtering, emails, fixes, ... (Request your free trial)
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