USN-7761-1

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Source
https://ubuntu.com/security/notices/USN-7761-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7761-1.json
JSON Data
https://api.test.osv.dev/v1/vulns/USN-7761-1
Upstream
Related
Published
2025-09-22T14:06:26.463983Z
Modified
2025-09-23T07:47:17.033825Z
Summary
pam vulnerability
Details

It was discovered that the PAM pam_access module incorrectly parsed certain rules as hostnames. An attacker could possibly use this issue to spoof hostnames and bypass access restrictions.

References

Affected packages

Ubuntu:24.04:LTS / pam

Package

Name
pam
Purl
pkg:deb/ubuntu/pam@1.5.3-5ubuntu5.5?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.5.3-5ubuntu5.5

Affected versions

1.*

1.5.2-6ubuntu1
1.5.2-9.1ubuntu1
1.5.2-9.1ubuntu2
1.5.2-9.1ubuntu3
1.5.3-5ubuntu3
1.5.3-5ubuntu4
1.5.3-5ubuntu5
1.5.3-5ubuntu5.1
1.5.3-5ubuntu5.4

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libpam-modules",
            "binary_version": "1.5.3-5ubuntu5.5"
        },
        {
            "binary_name": "libpam-modules-bin",
            "binary_version": "1.5.3-5ubuntu5.5"
        },
        {
            "binary_name": "libpam-runtime",
            "binary_version": "1.5.3-5ubuntu5.5"
        },
        {
            "binary_name": "libpam0g",
            "binary_version": "1.5.3-5ubuntu5.5"
        },
        {
            "binary_name": "libpam0g-dev",
            "binary_version": "1.5.3-5ubuntu5.5"
        }
    ]
}

Ubuntu:25.04 / pam

Package

Name
pam
Purl
pkg:deb/ubuntu/pam@1.5.3-7ubuntu4.4?arch=source&distro=plucky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.5.3-7ubuntu4.4

Affected versions

1.*

1.5.3-7ubuntu2
1.5.3-7ubuntu4
1.5.3-7ubuntu4.3

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libpam-modules",
            "binary_version": "1.5.3-7ubuntu4.4"
        },
        {
            "binary_name": "libpam-modules-bin",
            "binary_version": "1.5.3-7ubuntu4.4"
        },
        {
            "binary_name": "libpam-runtime",
            "binary_version": "1.5.3-7ubuntu4.4"
        },
        {
            "binary_name": "libpam0g",
            "binary_version": "1.5.3-7ubuntu4.4"
        },
        {
            "binary_name": "libpam0g-dev",
            "binary_version": "1.5.3-7ubuntu4.4"
        }
    ]
}