CVE-2020-26159 Information

Description

In Oniguruma 6.9.5_rev1 an attacker able to supply a regular expression for compilation may be able to overflow a buffer by one byte in concat_opt_exact_str in src/regcomp.c .

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

Reference

http://www.openwall.com/lists/oss-security/2020/09/30/7 https://github.com/kkos/oniguruma/commit/cbe9f8bd9cfc6c3c87a60fbae58fa1a85db59df0 https://github.com/kkos/oniguruma/issues/207 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2ZCUPCKJNSUHQMXXZBRNDDGQQLBJ2ACT/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4NHVR7X5ZLXUGW3PBCPQMNFQ3OJCSMQD/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZFUJY7BUIFBTZ3IUHVHCID4JYCRDGKPS/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

LOW

Availability Impact

LOW

Base Score

HIGH

Base Severity

8.6