title: downgrade of effective Strict Transport Security (STS) policy in postfix-mta-sts-resolver
description: In postfix-mta-sts-resolver before 0.5.1, All users can receive incorrect response from daemon under rare conditions, rendering downgrade of effective STS policy.
problem types: CWE-757: Selection of Less-Secure Algorithm During Negotiation ('Algorithm Downgrade')
affected:
{
product: postfix-mta-sts-resolver
vendor: Snawoot
versions:
status: affected, version: < 0.5.1
}
metrics:
cvssV3_1: [
attackComplexity: HIGH
attackVector: LOCAL
availabilityImpact: NONE
baseScore: 6.9
baseSeverity: MEDIUM
confidentialityImpact: HIGH
integrityImpact: HIGH
privilegesRequired: HIGH
scope: CHANGED
userInteraction: REQUIRED
vectorString: CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N
version: 3.1
]