UBUNTU-CVE-2020-21686

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Source
https://ubuntu.com/security/CVE-2020-21686
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-21686.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2020-21686
Upstream
Published
2023-08-22T19:16:00Z
Modified
2025-10-24T04:48:39Z
Severity
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A stack-use-after-scope issue discovered in expandmmacparams function in preproc.c in nasm before 2.15.04 allows remote attackers to cause a denial of service via crafted asm file.

References

Affected packages

Ubuntu:16.04:LTS / nasm

Package

Name
nasm
Purl
pkg:deb/ubuntu/nasm@2.11.08-1ubuntu0.1?arch=source&distro=xenial

Affected ranges

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

Affected versions

2.*

2.11.06-1really2.11.05-1
2.11.08-1
2.11.08-1ubuntu0.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.11.08-1ubuntu0.1",
            "binary_name": "nasm"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-21686.json"

Ubuntu:18.04:LTS / nasm

Package

Name
nasm
Purl
pkg:deb/ubuntu/nasm@2.13.02-0.1?arch=source&distro=bionic

Affected ranges

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

Affected versions

2.*

2.13.01-2
2.13.02-0.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.13.02-0.1",
            "binary_name": "nasm"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-21686.json"

Ubuntu:20.04:LTS / nasm

Package

Name
nasm
Purl
pkg:deb/ubuntu/nasm@2.14.02-1?arch=source&distro=focal

Affected ranges

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

Affected versions

2.*

2.14.02-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.14.02-1",
            "binary_name": "nasm"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-21686.json"