SB2021042720 - Fedora 33 update for python-yara, yara
Published: April 27, 2021
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 vulnerabilities.
1) Uncontrolled Recursion (CVE-ID: CVE-2017-9438)
CWE-ID: CWE-674 - Uncontrolled Recursion
CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
libyara/re.c in the regexp module in YARA 3.5.0 allows remote attackers to cause a denial of service (stack consumption) via a crafted rule (involving hex strings) that is mishandled in the _yr_re_emit function, a different vulnerability than CVE-2017-9304.
2) Integer overflow (CVE-ID: CVE-2021-3402)
CWE-ID: CWE-190 - Integer overflow
CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to integer overflow within the macho_parse_fat_file() function in the macho module. A remote attacker can pass specially crafted file to the application, trigger integer overflow and perform a denial of service (DoS) attack.
3) Out-of-bounds read (CVE-ID: CVE-2019-19648)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary condition in the "macho_parse_file" functionality in "macho/macho.c" file when "command_size" may be inconsistent with the real size. A remote attacker can send a specially crafted MachO file, trigger out-of-bounds read error and cause a denial of service condition on the target system.
Remediation
Install update from vendor's website.