DEBIAN-CVE-2026-86219
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.
DEBIAN-CVE-2026-86219
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-86219
libauthen-sasl-perl
Source reference: /affected/0/package/name
- Affected versions
- 2.1600-3
Source reference:
/affected/0/versions2.1700-1Source reference:
/affected/0/versions2.1800-1Source reference:
/affected/0/versions2.1900-1Source reference:
/affected/0/versions2.2000-1Source reference:
/affected/0/versions2.2000-2Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
libauthen-sasl-perl
Source reference: /affected/1/package/name
- Affected versions
- 2.1700-1
Source reference:
/affected/1/versions2.1800-1Source reference:
/affected/1/versions2.1900-1Source reference:
/affected/1/versions2.2000-1Source reference:
/affected/1/versions2.2000-2Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
libauthen-sasl-perl
Source reference: /affected/2/package/name
- Affected versions
- 2.1700-1
Source reference:
/affected/2/versions2.1800-1Source reference:
/affected/2/versions2.1900-1Source reference:
/affected/2/versions2.2000-1Source reference:
/affected/2/versions - Fixed versions
- 2.2000-2
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libauthen-sasl-perl",
"purl": "pkg:deb/debian/libauthen-sasl-perl?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"2.1600-3",
"2.1700-1",
"2.1800-1",
"2.1900-1",
"2.2000-1",
"2.2000-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-86219.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libauthen-sasl-perl",
"purl": "pkg:deb/debian/libauthen-sasl-perl?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"2.1700-1",
"2.1800-1",
"2.1900-1",
"2.2000-1",
"2.2000-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-86219.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.2000-2"
}
]
}
],
"package": {
"name": "libauthen-sasl-perl",
"purl": "pkg:deb/debian/libauthen-sasl-perl?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"2.1700-1",
"2.1800-1",
"2.1900-1",
"2.2000-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-86219.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #58379 · Revision 1
- Added to Heist Feed
- Publisher date