Source: libnet-oauth-perl Version: 0.32-1 Severity: important Tags: security upstream X-Debbugs-Cc: [email protected], Debian Security Team <[email protected]>
Hi, The following vulnerability was published for libnet-oauth-perl. CVE-2026-72889[0]: | Net::OAuth versions before 0.33 for Perl allow the sender to choose | the signature algorithm in verify. verify resolves the signature | method class from the signature_method parameter of the incoming | message. signature_method is required on every request, so the | algorithm used to check a signature is chosen by whoever sent it, | and nothing lets the verifying party pin the method instead. When a | message names HMAC-SHA1 or HMAC-SHA256, the key is derived from | consumer_secret and token_secret rather than from the key the | provider deployed. A provider deployed on RSA-SHA1 holds only the | consumer public key, and RFC 5849 does not use consumer_secret for | that method, so the required parameter is filled with a placeholder. | A client that names HMAC-SHA1 instead has its signature checked | against that placeholder, so a guessable one is enough to forge | requests for any consumer key and token. If you fix the vulnerability please also make sure to include the CVE (Common Vulnerabilities & Exposures) id in your changelog entry. For further information see: [0] https://security-tracker.debian.org/tracker/CVE-2026-72889 https://www.cve.org/CVERecord?id=CVE-2026-72889 [1] https://lists.security.metacpan.org/cve-announce/msg/42818761/ [2] https://github.com/vurtdev/Net-OAuth/security/advisories/GHSA-c8rm-g5cm-4pf5 [3] https://github.com/vurtdev/Net-OAuth/commit/c467adf45c8d77ac4b92ad78b3eebf949252ba7f Please adjust the affected versions in the BTS as needed. Regards, Salvatore
