UBUNTU-CVE-2018-19974

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Source
https://ubuntu.com/security/CVE-2018-19974
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-19974.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2018-19974
Upstream
Published
2018-12-17T19:29:00Z
Modified
2025-10-24T04:47:17Z
Severity
  • 5.5 (Medium) CVSS_V3 - CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

In YARA 3.8.1, bytecode in a specially crafted compiled rule can read uninitialized data from VM scratch memory in libyara/exec.c. This can allow attackers to discover addresses in the real stack (not the YARA virtual stack).

References

Affected packages

Ubuntu:16.04:LTS / yara

Package

Name
yara
Purl
pkg:deb/ubuntu/yara@3.4.0+dfsg-2build1?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

3.*

3.4.0+dfsg-2
3.4.0+dfsg-2build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libyara-dev",
            "binary_version": "3.4.0+dfsg-2build1"
        },
        {
            "binary_name": "libyara3",
            "binary_version": "3.4.0+dfsg-2build1"
        },
        {
            "binary_name": "python-yara",
            "binary_version": "3.4.0+dfsg-2build1"
        },
        {
            "binary_name": "python3-yara",
            "binary_version": "3.4.0+dfsg-2build1"
        },
        {
            "binary_name": "yara",
            "binary_version": "3.4.0+dfsg-2build1"
        }
    ]
}

Ubuntu:18.04:LTS / yara

Package

Name
yara
Purl
pkg:deb/ubuntu/yara@3.7.1-1ubuntu2?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

3.*

3.6.3+dfsg-1ubuntu1
3.7.1-1ubuntu1
3.7.1-1ubuntu2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libyara-dev",
            "binary_version": "3.7.1-1ubuntu2"
        },
        {
            "binary_name": "libyara3",
            "binary_version": "3.7.1-1ubuntu2"
        },
        {
            "binary_name": "yara",
            "binary_version": "3.7.1-1ubuntu2"
        }
    ]
}

Ubuntu:25.10 / yara

Package

Name
yara
Purl
pkg:deb/ubuntu/yara@4.5.4-1?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

4.*

4.5.2-1
4.5.3-1
4.5.4-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libyara-dev",
            "binary_version": "4.5.4-1"
        },
        {
            "binary_name": "libyara10",
            "binary_version": "4.5.4-1"
        },
        {
            "binary_name": "yara",
            "binary_version": "4.5.4-1"
        }
    ]
}

Ubuntu:25.04 / yara

Package

Name
yara
Purl
pkg:deb/ubuntu/yara@4.5.2-1?arch=source&distro=plucky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

4.*

4.5.1-1
4.5.2-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libyara-dev",
            "binary_version": "4.5.2-1"
        },
        {
            "binary_name": "libyara10",
            "binary_version": "4.5.2-1"
        },
        {
            "binary_name": "yara",
            "binary_version": "4.5.2-1"
        }
    ]
}