UBUNTU-CVE-2026-86219

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Source
https://ubuntu.com/security/CVE-2026-86219
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-86219.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-86219
Upstream
Downstream
Related
Published
2026-09-06T18:17:00Z
Modified
2026-10-17T13:01:13Z
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
  • Ubuntu - medium
Summary
[none]
Details

Authen::SASL::Perl::DIGEST_MD5 versions before 2.2100 for Perl accept replayed authentication responses via unverified nonce in server_step. server_start generates a fresh nonce and sends it in the challenge, and nothing later compares that value against the nonce the client returns. server_step derives the expected digest from the client's own parameters, so a response verifies whenever its digest matches the nonce it carries. The count table it also checks is keyed on the client-supplied nonce and starts empty in each new server object, so a captured first response, carrying nc=00000001, passes that too. RFC 2831 defines the nonce in the response as the value the server sent in the preceding challenge. An attacker who observes one successful qop=auth exchange can replay the captured response against a later session for the same service, host, realm and user, and authenticate as that user without knowing the password.

References

Affected packages

Ubuntu:22.04:LTS
libauthen-sasl-perl

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.1600-1.1ubuntu0.1

Affected versions

2.*
2.1600-1.1

Ecosystem specific 

{
    "availability":  "No subscription required",
    "binaries":  [
        {
            "binary_name":  "libauthen-sasl-perl",
            "binary_version":  "2.1600-1.1ubuntu0.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-86219.json"
Ubuntu:24.04:LTS
libauthen-sasl-perl

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.1700-1ubuntu0.1

Affected versions

2.*
2.1600-3
2.1700-1

Ecosystem specific 

{
    "availability":  "No subscription required",
    "binaries":  [
        {
            "binary_name":  "libauthen-sasl-perl",
            "binary_version":  "2.1700-1ubuntu0.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-86219.json"
Ubuntu:26.04:LTS
libauthen-sasl-perl

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.2000-1ubuntu0.1

Affected versions

2.*
2.1700-1
2.2000-1

Ecosystem specific 

{
    "availability":  "No subscription required",
    "binaries":  [
        {
            "binary_name":  "libauthen-sasl-perl",
            "binary_version":  "2.2000-1ubuntu0.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-86219.json"
Ubuntu:26.10
libauthen-sasl-perl

Package

Name
libauthen-sasl-perl
Purl
pkg:deb/ubuntu/libauthen-sasl-perl?arch=source&distro=stonking

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.2000-1ubuntu1

Affected versions

2.*
2.2000-1

Ecosystem specific 

{
    "availability":  "No subscription required",
    "binaries":  [
        {
            "binary_name":  "libauthen-sasl-perl",
            "binary_version":  "2.2000-1ubuntu1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-86219.json"
Ubuntu:Pro:14.04:LTS
libauthen-sasl-perl

Package

Name
libauthen-sasl-perl
Purl
pkg:deb/ubuntu/libauthen-sasl-perl?arch=source&distro=esm-infra-legacy%2Ftrusty

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.1500-1ubuntu0.1~esm1

Affected versions

2.*
2.1500-1

Ecosystem specific 

{
    "availability":  "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
    "binaries":  [
        {
            "binary_name":  "libauthen-sasl-perl",
            "binary_version":  "2.1500-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-86219.json"
Ubuntu:Pro:16.04:LTS
libauthen-sasl-perl

Package

Name
libauthen-sasl-perl
Purl
pkg:deb/ubuntu/libauthen-sasl-perl?arch=source&distro=esm-infra-legacy%2Fxenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.1600-1ubuntu0.16.04.1~esm1

Affected versions

2.*
2.1600-1

Ecosystem specific 

{
    "availability":  "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
    "binaries":  [
        {
            "binary_name":  "libauthen-sasl-perl",
            "binary_version":  "2.1600-1ubuntu0.16.04.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-86219.json"
Ubuntu:Pro:18.04:LTS
libauthen-sasl-perl

Package

Name
libauthen-sasl-perl
Purl
pkg:deb/ubuntu/libauthen-sasl-perl?arch=source&distro=esm-infra%2Fbionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.1600-1ubuntu0.18.04.1~esm1

Affected versions

2.*
2.1600-1

Ecosystem specific 

{
    "availability":  "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries":  [
        {
            "binary_name":  "libauthen-sasl-perl",
            "binary_version":  "2.1600-1ubuntu0.18.04.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-86219.json"
Ubuntu:Pro:20.04:LTS
libauthen-sasl-perl

Package

Name
libauthen-sasl-perl
Purl
pkg:deb/ubuntu/libauthen-sasl-perl?arch=source&distro=esm-infra%2Ffocal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.1600-1ubuntu0.20.04.1~esm1

Affected versions

2.*
2.1600-1

Ecosystem specific 

{
    "availability":  "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries":  [
        {
            "binary_name":  "libauthen-sasl-perl",
            "binary_version":  "2.1600-1ubuntu0.20.04.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-86219.json"