DEBIAN-CVE-2026-72889
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-72889
- Import Source
- https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-72889.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2026-72889
- Upstream
- Published
- 2026-08-19T08:17:13Z
- Modified
- 2026-09-01T16:07:00Z
- 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
- Summary
- [none]
- Details
-
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.
- References
Affected packages
Debian:12 / libnet-oauth-perl
Package
- Name
- libnet-oauth-perl
- Purl
- pkg:deb/debian/libnet-oauth-perl?arch=source&distro=bookworm
Debian:13 / libnet-oauth-perl
Package
- Name
- libnet-oauth-perl
- Purl
- pkg:deb/debian/libnet-oauth-perl?arch=source&distro=trixie
Debian:14 / libnet-oauth-perl
Package
- Name
- libnet-oauth-perl
- Purl
- pkg:deb/debian/libnet-oauth-perl?arch=source&distro=forky