UBUNTU-CVE-2020-10595

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Source
https://ubuntu.com/security/CVE-2020-10595
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-10595.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2020-10595
Related
Published
2020-03-31T03:00:00Z
Modified
2025-01-13T10:22:10Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

pam-krb5 before 4.9 has a buffer overflow that might cause remote code execution in situations involving supplemental prompting by a Kerberos library. It may overflow a buffer provided by the underlying Kerberos library by a single '\0' byte if an attacker responds to a prompt with an answer of a carefully chosen length. The effect may range from heap corruption to stack corruption depending on the structure of the underlying Kerberos library, with unknown effects but possibly including code execution. This code path is not used for normal authentication, but only when the Kerberos library does supplemental prompting, such as with PKINIT or when using the non-standard no_prompt PAM configuration option.

References

Affected packages

Ubuntu:Pro:14.04:LTS / libpam-krb5

Package

Name
libpam-krb5
Purl
pkg:deb/ubuntu/libpam-krb5@4.6-2ubuntu0.1~esm1?arch=source&distro=trusty/esm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.6-2ubuntu0.1~esm1

Affected versions

4.*

4.6-2

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "ubuntu_priority": "medium",
    "binaries": [
        {
            "binary_version": "4.6-2ubuntu0.1~esm1",
            "binary_name": "libpam-heimdal"
        },
        {
            "binary_version": "4.6-2ubuntu0.1~esm1",
            "binary_name": "libpam-heimdal-dbgsym"
        },
        {
            "binary_version": "4.6-2ubuntu0.1~esm1",
            "binary_name": "libpam-krb5"
        },
        {
            "binary_version": "4.6-2ubuntu0.1~esm1",
            "binary_name": "libpam-krb5-dbgsym"
        }
    ]
}

Ubuntu:16.04:LTS / libpam-krb5

Package

Name
libpam-krb5
Purl
pkg:deb/ubuntu/libpam-krb5@4.7-2ubuntu0.1?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.7-2ubuntu0.1

Affected versions

4.*

4.7-2

Ecosystem specific 

{
    "availability": "No subscription required",
    "ubuntu_priority": "medium",
    "binaries": [
        {
            "binary_version": "4.7-2ubuntu0.1",
            "binary_name": "libpam-heimdal"
        },
        {
            "binary_version": "4.7-2ubuntu0.1",
            "binary_name": "libpam-heimdal-dbgsym"
        },
        {
            "binary_version": "4.7-2ubuntu0.1",
            "binary_name": "libpam-krb5"
        },
        {
            "binary_version": "4.7-2ubuntu0.1",
            "binary_name": "libpam-krb5-dbgsym"
        }
    ]
}

Ubuntu:18.04:LTS / libpam-krb5

Package

Name
libpam-krb5
Purl
pkg:deb/ubuntu/libpam-krb5@4.8-1ubuntu0.1?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.8-1ubuntu0.1

Affected versions

4.*

4.7-4
4.8-1

Ecosystem specific 

{
    "availability": "No subscription required",
    "ubuntu_priority": "medium",
    "binaries": [
        {
            "binary_version": "4.8-1ubuntu0.1",
            "binary_name": "libpam-heimdal"
        },
        {
            "binary_version": "4.8-1ubuntu0.1",
            "binary_name": "libpam-heimdal-dbgsym"
        },
        {
            "binary_version": "4.8-1ubuntu0.1",
            "binary_name": "libpam-krb5"
        },
        {
            "binary_version": "4.8-1ubuntu0.1",
            "binary_name": "libpam-krb5-dbgsym"
        }
    ]
}