UBUNTU-CVE-2020-6096

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Source
https://ubuntu.com/security/CVE-2020-6096
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-6096.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2020-6096
Upstream
Downstream
Related
Published
2020-04-01T22:15:00Z
Modified
2025-07-16T08:25:35.374089Z
Severity
  • 8.1 (High) CVSS_V3 - CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • 8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - low
Summary
[none]
Details

An exploitable signed comparison vulnerability exists in the ARMv7 memcpy() implementation of GNU glibc 2.30.9000. Calling memcpy() (on ARMv7 targets that utilize the GNU glibc implementation) with a negative value for the 'num' parameter results in a signed comparison vulnerability. If an attacker underflows the 'num' parameter to memcpy(), this vulnerability could lead to undefined behavior such as writing to out-of-bounds memory and potentially remote code execution. Furthermore, this memcpy() implementation allows for program execution to continue in scenarios where a segmentation fault or crash should have occurred. The dangers occur in that subsequent execution and iterations of this code will be executed with this corrupted data.

References

Affected packages

Ubuntu:Pro:14.04:LTS / eglibc

Package

Name
eglibc
Purl
pkg:deb/ubuntu/eglibc@2.19-0ubuntu6.15+esm4?arch=source&distro=esm-infra-legacy/trusty

Affected ranges

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

Affected versions

2.*

2.17-93ubuntu4
2.18-0ubuntu1
2.18-0ubuntu2
2.18-0ubuntu4
2.18-0ubuntu5
2.18-0ubuntu6
2.18-0ubuntu7
2.19-0ubuntu2
2.19-0ubuntu3
2.19-0ubuntu4
2.19-0ubuntu5
2.19-0ubuntu6
2.19-0ubuntu6.1
2.19-0ubuntu6.3
2.19-0ubuntu6.4
2.19-0ubuntu6.5
2.19-0ubuntu6.6
2.19-0ubuntu6.7
2.19-0ubuntu6.8
2.19-0ubuntu6.9
2.19-0ubuntu6.10
2.19-0ubuntu6.11
2.19-0ubuntu6.13
2.19-0ubuntu6.14
2.19-0ubuntu6.15
2.19-0ubuntu6.15+esm1
2.19-0ubuntu6.15+esm2
2.19-0ubuntu6.15+esm3
2.19-0ubuntu6.15+esm4

Ubuntu:16.04:LTS / glibc

Package

Name
glibc
Purl
pkg:deb/ubuntu/glibc@2.23-0ubuntu11.3?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.23-0ubuntu11.3

Affected versions

2.*

2.21-0ubuntu4
2.21-0ubuntu5
2.21-0ubuntu6
2.23-0ubuntu1
2.23-0ubuntu2
2.23-0ubuntu3
2.23-0ubuntu4
2.23-0ubuntu5
2.23-0ubuntu6
2.23-0ubuntu7
2.23-0ubuntu9
2.23-0ubuntu10
2.23-0ubuntu11
2.23-0ubuntu11.2

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "glibc-doc",
            "binary_version": "2.23-0ubuntu11.3"
        },
        {
            "binary_name": "glibc-source",
            "binary_version": "2.23-0ubuntu11.3"
        },
        {
            "binary_name": "libc-bin",
            "binary_version": "2.23-0ubuntu11.3"
        },
        {
            "binary_name": "libc-bin-dbgsym",
            "binary_version": "2.23-0ubuntu11.3"
        },
        {
            "binary_name": "libc-dev-bin",
            "binary_version": "2.23-0ubuntu11.3"
        },
        {
            "binary_name": "libc-dev-bin-dbgsym",
            "binary_version": "2.23-0ubuntu11.3"
        },
        {
            "binary_name": "libc6",
            "binary_version": "2.23-0ubuntu11.3"
        },
        {
            "binary_name": "libc6-amd64",
            "binary_version": "2.23-0ubuntu11.3"
        },
        {
            "binary_name": "libc6-amd64-dbgsym",
            "binary_version": "2.23-0ubuntu11.3"
        },
        {
            "binary_name": "libc6-armel",
            "binary_version": "2.23-0ubuntu11.3"
        },
        {
            "binary_name": "libc6-armel-dbgsym",
            "binary_version": "2.23-0ubuntu11.3"
        },
        {
            "binary_name": "libc6-dbg",
            "binary_version": "2.23-0ubuntu11.3"
        },
        {
            "binary_name": "libc6-dbgsym",
            "binary_version": "2.23-0ubuntu11.3"
        },
        {
            "binary_name": "libc6-dev",
            "binary_version": "2.23-0ubuntu11.3"
        },
        {
            "binary_name": "libc6-dev-amd64",
            "binary_version": "2.23-0ubuntu11.3"
        },
        {
            "binary_name": "libc6-dev-armel",
            "binary_version": "2.23-0ubuntu11.3"
        },
        {
            "binary_name": "libc6-dev-i386",
            "binary_version": "2.23-0ubuntu11.3"
        },
        {
            "binary_name": "libc6-dev-ppc64",
            "binary_version": "2.23-0ubuntu11.3"
        },
        {
            "binary_name": "libc6-dev-s390",
            "binary_version": "2.23-0ubuntu11.3"
        },
        {
            "binary_name": "libc6-dev-x32",
            "binary_version": "2.23-0ubuntu11.3"
        },
        {
            "binary_name": "libc6-i386",
            "binary_version": "2.23-0ubuntu11.3"
        },
        {
            "binary_name": "libc6-i386-dbgsym",
            "binary_version": "2.23-0ubuntu11.3"
        },
        {
            "binary_name": "libc6-pic",
            "binary_version": "2.23-0ubuntu11.3"
        },
        {
            "binary_name": "libc6-ppc64",
            "binary_version": "2.23-0ubuntu11.3"
        },
        {
            "binary_name": "libc6-ppc64-dbgsym",
            "binary_version": "2.23-0ubuntu11.3"
        },
        {
            "binary_name": "libc6-s390",
            "binary_version": "2.23-0ubuntu11.3"
        },
        {
            "binary_name": "libc6-s390-dbgsym",
            "binary_version": "2.23-0ubuntu11.3"
        },
        {
            "binary_name": "libc6-udeb",
            "binary_version": "2.23-0ubuntu11.3"
        },
        {
            "binary_name": "libc6-udeb-dbgsym",
            "binary_version": "2.23-0ubuntu11.3"
        },
        {
            "binary_name": "libc6-x32",
            "binary_version": "2.23-0ubuntu11.3"
        },
        {
            "binary_name": "libc6-x32-dbgsym",
            "binary_version": "2.23-0ubuntu11.3"
        },
        {
            "binary_name": "locales",
            "binary_version": "2.23-0ubuntu11.3"
        },
        {
            "binary_name": "locales-all",
            "binary_version": "2.23-0ubuntu11.3"
        },
        {
            "binary_name": "multiarch-support",
            "binary_version": "2.23-0ubuntu11.3"
        },
        {
            "binary_name": "nscd",
            "binary_version": "2.23-0ubuntu11.3"
        },
        {
            "binary_name": "nscd-dbgsym",
            "binary_version": "2.23-0ubuntu11.3"
        }
    ]
}

Ubuntu:18.04:LTS / glibc

Package

Name
glibc
Purl
pkg:deb/ubuntu/glibc@2.27-3ubuntu1.5?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.27-3ubuntu1.5

Affected versions

2.*

2.26-0ubuntu2
2.26-0ubuntu2.1
2.27-0ubuntu2
2.27-0ubuntu3
2.27-3ubuntu1
2.27-3ubuntu1.2
2.27-3ubuntu1.3
2.27-3ubuntu1.4

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "glibc-doc",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "glibc-source",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc-bin",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc-bin-dbgsym",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc-dev-bin",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc-dev-bin-dbgsym",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc6",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc6-amd64",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc6-amd64-dbgsym",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc6-armel",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc6-armel-dbgsym",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc6-dbg",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc6-dev",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc6-dev-amd64",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc6-dev-armel",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc6-dev-i386",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc6-dev-s390",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc6-dev-x32",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc6-i386",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc6-i386-dbgsym",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc6-lse",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc6-pic",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc6-s390",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc6-s390-dbgsym",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc6-udeb",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc6-x32",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc6-x32-dbgsym",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "locales",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "locales-all",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "multiarch-support",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "nscd",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "nscd-dbgsym",
            "binary_version": "2.27-3ubuntu1.5"
        }
    ]
}

Ubuntu:20.04:LTS / glibc

Package

Name
glibc
Purl
pkg:deb/ubuntu/glibc@2.31-0ubuntu9.7?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.31-0ubuntu9.7

Affected versions

2.*

2.30-0ubuntu2
2.30-0ubuntu3
2.31-0ubuntu5
2.31-0ubuntu6
2.31-0ubuntu7
2.31-0ubuntu9
2.31-0ubuntu9.1
2.31-0ubuntu9.2
2.31-0ubuntu9.3

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "glibc-doc",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "glibc-source",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc-bin",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc-bin-dbgsym",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc-dev-bin",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc-dev-bin-dbgsym",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6-amd64",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6-amd64-dbgsym",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6-armel",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6-armel-dbgsym",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6-dbg",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6-dev",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6-dev-amd64",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6-dev-armel",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6-dev-i386",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6-dev-s390",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6-dev-x32",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6-i386",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6-i386-dbgsym",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6-lse",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6-pic",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6-prof",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6-s390",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6-s390-dbgsym",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6-udeb",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6-x32",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6-x32-dbgsym",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "locales",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "locales-all",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "nscd",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "nscd-dbgsym",
            "binary_version": "2.31-0ubuntu9.7"
        }
    ]
}