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Date: Fri, 22 Mar 2024 12:10:37 -0700
From: Alan Coopersmith <alan.coopersmith@...cle.com>
To: oss-security@...ts.openwall.com
Subject: GnuTLS 3.8.4 released, fixes CVE-2024-28834 & CVE-2024-28835
https://lists.gnupg.org/pipermail/gnutls-help/2024-March/004845.html
announced the release of GnuTLS 3.8.4, including these fixes:
> ** libgnutls: Fix side-channel in the deterministic ECDSA. Reported by
> George Pantelakis (#1516). [GNUTLS-SA-2023-12-04, CVSS: medium]
> [CVE-2024-28834]
>
> ** libgnutls: Fixed a bug where certtool crashed when verifying a
> certificate chain with more than 16 certificates. Reported by William
> Woodruff (#1525) and yixiangzhike (#1527). [GNUTLS-SA-2024-01-23, CVSS:
> medium] [CVE-2024-28835]
https://gnutls.org/security-new.html#GNUTLS-SA-2023-12-04 says:
> CVE-2024-28834 Severity Medium; timing sidechannel in deterministic ECDSA
>
> A vulnerability was found that the deterministic ECDSA code leaks bit-length
> of random nonce which allows for full recovery of the private key used after
> observing a few hundreds to a few thousands of signatures on known messages,
> due to the application of lattice techniques. The issue was reported in the
> issue tracker as #1516.
>
> https://gitlab.com/gnutls/gnutls/-/issues/1516
>
> Recommendation: To address the issue found upgrade to GnuTLS 3.8.4 or later
> versions.
https://gnutls.org/security-new.html#GNUTLS-SA-2024-01-23 says:
> CVE-2024-28835 Severity Medium; Denial of service
>
> When validating a certificate chain with more then 16 certificates GnuTLS
> applications crash with an assertion failure. The issue was reported in the
> issue tracker as #1527 and #1525.
>
> https://gitlab.com/gnutls/gnutls/-/issues/1527
> https://gitlab.com/gnutls/gnutls/-/issues/1525
>
> Recommendation: To address the issue found upgrade to GnuTLS 3.8.4 or later
> versions.
--
-Alan Coopersmith- alan.coopersmith@...cle.com
Oracle Solaris Engineering - https://blogs.oracle.com/solaris
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