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CVE-2026-42010

Discovered by AISLEPUBLISHEDCWE-170

Description

A flaw was found in gnutls. Servers configured with RSA-PSK (Rivest–Shamir–Adleman – Pre-Shared Key) wrongfully matched usernames containing a NUL character with truncated usernames. A remote attacker could exploit this by sending a specially crafted username, leading to an authentication bypass. This vulnerability allows an attacker to gain unauthorized access by circumventing the authentication process.

CVSS Base Scores

CVSS v3.1(Primary)
7.1

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

Affected Products

VendorProductVersionStatus
Red HatGnuTLS0:3.8.10-4.el10_2unaffected
Red HatGnuTLS0:3.8.9-9.el10_0.19—
Red HatGnuTLS0:3.6.16-8.el8_10.6—
Red HatGnuTLS0:3.6.14-10.el8_4.1—
Red HatGnuTLS0:4.13-3.el8_4.1—
Red HatGnuTLS0:3.6.16-5.el8_6.5—
Red HatGnuTLS0:4.13-3.el8_6.2—
Red HatGnuTLS0:3.6.16-7.el8_8.4—
Red HatGnuTLS0:4.13-4.el8_8.1—
Red HatGnuTLS0:3.8.10-4.el9_8—
Red HatGnuTLS0:3.8.3-4.el9_4.6—
Red HatGnuTLS0:3.8.3-6.el9_6.4—
Red HatGnuTLS1782159791—
Red HatGnuTLS1782166952—
Red HatGnuTLS3.8.13-1.hum1—
Red HatGnuTLS1781525684—
Red HatGnuTLS1781525671—
Red HatGnuTLS1781525693—
Red HatGnuTLS1781525739—

Credits

  • Red Hat would like to thank Joshua Rogers (AISLE Research Team) for reporting this issue.

References