ArchLinuxASA-202107-10[ASA-202107-10] mruby: arbitrary code execution
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS
Percentile
52.3%
Arch Linux Security Advisory ASA-202107-10
Severity: Medium
Date : 2021-07-01
CVE-ID : CVE-2020-36401
Package : mruby
Type : arbitrary code execution
Remote : Yes
Link : https://security.archlinux.org/AVG-2116
Summary
The package mruby before version 3.0.0-1 is vulnerable to arbitrary
code execution.
Resolution
Upgrade to 3.0.0-1.
pacman -Syu “mruby>=3.0.0-1”
The problem has been fixed upstream in version 3.0.0.
Workaround
None.
Description
mruby 2.1.2 has a double free in mrb_default_allocf (called from
mrb_free and obj_free).
Impact
An attacker could execute arbitrary code through a use after free.
References
https://github.com/google/oss-fuzz-vulns/blob/main/vulns/mruby/OSV-2020-744.yaml
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=23801
https://github.com/mruby/mruby/commit/97319697c8f9f6ff27b32589947e1918e3015503
https://security.archlinux.org/CVE-2020-36401
Related
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS
Percentile
52.3%