suse-su-2026:4280-1
HIGH CVSS 7.4 csaf_suse
Description
Security update for perl-Authen-SASL
Timeline
- Published
- 2026-09-22 08:32 UTC
- Last Modified
- 2026-09-23
CVSS Details
CVSS details not available.
Affected Products
No product information available.
References
No references available.
Linked Vulnerabilities
No linked vulnerabilities found.
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"text": "Authen::SASL::Perl::DIGEST_MD5 versions before 2.2100 for Perl accept replayed authentication responses via unverified nonce in server_step.\n\nserver_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.\n\nAn 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.",
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