Fedora 30 update for python-yara, yara



| Updated: 2025-04-24
Risk Low
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2018-19974
CVE-2018-19975
CVE-2018-19976
CWE-ID CWE-200
Exploitation vector Local
Public exploit Public exploit code for vulnerability #1 is available.
Public exploit code for vulnerability #2 is available.
Public exploit code for vulnerability #3 is available.
Vulnerable software
 Fedora
Operating systems & Components / Operating system

yara
Operating systems & Components / Operating system package or component

python-yara
Operating systems & Components / Operating system package or component

Vendor Fedoraproject

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Information disclosure

EUVDB-ID: #VU16657

Risk: Low

CVSSv4.0: 5.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2018-19974

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

Exploit availability: No

Description

The vulnerability allows a local attacker to gain access to potentially sensitive information.

The vulnerability exists due to the design of the YARA virtual machine (VM). A local attacker can execute a compiled rule file that submits malicious input and read uninitialized data from VM scratch memory in libyara/exec.c.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 30

yara: before 3.9.0-1.fc30

python-yara: before 3.9.0-2.fc30

CPE2.3 External links

https://bodhi.fedoraproject.org/updates/FEDORA-2019-c3627a0e7a


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.

2) Information disclosure

EUVDB-ID: #VU16656

Risk: Low

CVSSv4.0: 5.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2018-19975

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

Exploit availability: No

Description

The vulnerability allows a local attacker to gain access to potentially sensitive information.

The vulnerability exists due to the design of the YARA virtual machine (VM), which could allow an attacker to use OP_COUNT to read a DWORD value from any arbitrary memory address. A local attacker can execute a compiled rule file that submits malicious input and read data from any arbitrary address in memory, in libyara/exec.c.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 30

yara: before 3.9.0-1.fc30

python-yara: before 3.9.0-2.fc30

CPE2.3 External links

https://bodhi.fedoraproject.org/updates/FEDORA-2019-c3627a0e7a


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.

3) Information disclosure

EUVDB-ID: #VU16658

Risk: Low

CVSSv4.0: 5.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2018-19976

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

Exploit availability: No

Description

The vulnerability allows a local attacker to gain access to potentially sensitive information.

The vulnerability exists due to the design of the YARA virtual machine. A local attacker can execute a compiled rule file that submits malicious input and read uninitialized data from VM scratch memory in libyara/exec.c.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 30

yara: before 3.9.0-1.fc30

python-yara: before 3.9.0-2.fc30

CPE2.3 External links

https://bodhi.fedoraproject.org/updates/FEDORA-2019-c3627a0e7a


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.



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