UBUNTU-CVE-2026-75589

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Source
https://ubuntu.com/security/CVE-2026-75589
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75589.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-75589
Upstream
Published
2026-08-20T00:00:00Z
Modified
2026-08-20T10:46:17.818648824Z
Severity
  • Ubuntu - medium
Summary
[none]
Details

Net::OAuth versions before 0.33 for Perl check HMAC-SHA1, HMAC-SHA256 and PLAINTEXT signatures with a non-constant-time comparison in verify. Each of the three compares the signature carried in the message against the locally computed one with the eq operator, which returns as soon as the two strings differ. The time taken to reject a signature varies with the length of the matching prefix. RSA-SHA1 is not affected, as it verifies through the RSA key object rather than by comparing strings. A client that can submit messages and time the replies may recover a valid signature one byte at a time rather than searching the whole signature space. Under PLAINTEXT the value compared against is the signature key itself, so the search recovers consumersecret and tokensecret.

References

Affected packages

Ubuntu:16.04:LTS
libnet-oauth-perl

Package

Name
libnet-oauth-perl
Purl
pkg:deb/ubuntu/libnet-oauth-perl?arch=source&distro=xenial

Affected ranges

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

Affected versions

0.*
0.28-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libnet-oauth-perl",
            "binary_version": "0.28-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75589.json"
Ubuntu:18.04:LTS
libnet-oauth-perl

Package

Name
libnet-oauth-perl
Purl
pkg:deb/ubuntu/libnet-oauth-perl?arch=source&distro=bionic

Affected ranges

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

Affected versions

0.*
0.28-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libnet-oauth-perl",
            "binary_version": "0.28-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75589.json"
Ubuntu:20.04:LTS
libnet-oauth-perl

Package

Name
libnet-oauth-perl
Purl
pkg:deb/ubuntu/libnet-oauth-perl?arch=source&distro=focal

Affected ranges

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

Affected versions

0.*
0.28-3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libnet-oauth-perl",
            "binary_version": "0.28-3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75589.json"
Ubuntu:22.04:LTS
libnet-oauth-perl

Package

Name
libnet-oauth-perl
Purl
pkg:deb/ubuntu/libnet-oauth-perl?arch=source&distro=jammy

Affected ranges

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

Affected versions

0.*
0.28-3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libnet-oauth-perl",
            "binary_version": "0.28-3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75589.json"
Ubuntu:24.04:LTS
libnet-oauth-perl

Package

Name
libnet-oauth-perl
Purl
pkg:deb/ubuntu/libnet-oauth-perl?arch=source&distro=noble

Affected ranges

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

Affected versions

0.*
0.28-4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libnet-oauth-perl",
            "binary_version": "0.28-4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75589.json"
Ubuntu:26.04:LTS
libnet-oauth-perl

Package

Name
libnet-oauth-perl
Purl
pkg:deb/ubuntu/libnet-oauth-perl?arch=source&distro=resolute

Affected ranges

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

Affected versions

0.*
0.31-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libnet-oauth-perl",
            "binary_version": "0.31-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75589.json"