Описание
Security update for gnutls
This update for gnutls fixes the following issues
- CVE-2026-3833: incorrectly accepted domain names due to comparison during name constraints processing being case-sensitive (bsc#1263707).
- CVE-2026-5260: heap overread when processing extremely short premaster secret as part of an RSA key exchange (bsc#1263715).
- CVE-2026-42011: name constraint bypass leading to acceptance of invalid certificates during certificate validation (bsc#1263710).
- CVE-2026-42013: certificate validation bypass when validating certificates with an oversized SAN (bsc#1263712).
- CVE-2026-42014: use-after-free when an attacker attempts to change the PIN with a NULL old PIN for a token that lacks a protected authentication path (bsc#1263713).
- CVE-2026-42015: memory corruption when appending to a PKCS#12 bag that already contains 32 elements (bsc#1263714).
Список пакетов
SUSE Linux Enterprise Server LTSS Extended Security 12 SP5
Ссылки
- Link for SUSE-SU-2026:2923-1
- E-Mail link for SUSE-SU-2026:2923-1
- SUSE Security Ratings
- SUSE Bug 1263707
- SUSE Bug 1263710
- SUSE Bug 1263712
- SUSE Bug 1263713
- SUSE Bug 1263714
- SUSE Bug 1263715
- SUSE CVE CVE-2026-3833 page
- SUSE CVE CVE-2026-42011 page
- SUSE CVE CVE-2026-42013 page
- SUSE CVE CVE-2026-42014 page
- SUSE CVE CVE-2026-42015 page
- SUSE CVE CVE-2026-5260 page
Описание
A flaw was found in gnutls. This vulnerability occurs because gnutls performs case-sensitive comparisons of `nameConstraints` labels, specifically for `dNSName` (DNS) or `rfc822Name` (email) constraints within `excludedSubtrees` or `permittedSubtrees`. A remote attacker can exploit this by crafting a leaf certificate with casing differences in the Subject Alternative Name (SAN), leading to a policy bypass where a certificate that should be rejected is instead accepted. This could result in unauthorized access or information disclosure.
Затронутые продукты
Ссылки
- CVE-2026-3833
- SUSE Bug 1263707
Описание
A flaw was found in gnutls. This vulnerability occurs because permitted name constraints were incorrectly ignored when previous Certificate Authorities (CAs) only had excluded name constraints. A remote attacker could exploit this to bypass critical name constraint checks during certificate validation. This bypass could lead to the acceptance of invalid certificates, potentially enabling spoofing or man-in-the-middle attacks against affected systems.
Затронутые продукты
Ссылки
- CVE-2026-42011
- SUSE Bug 1263710
Описание
A flaw was found in gnutls. When validating certificates, an oversized Subject Alternative Name (SAN) could cause the validation process to incorrectly fall back to checking the Common Name (CN) field. This could allow a remote attacker to bypass proper certificate validation, potentially leading to spoofing or man-in-the-middle attacks.
Затронутые продукты
Ссылки
- CVE-2026-42013
- SUSE Bug 1263712
Описание
A flaw was found in GnuTLS. The `gnutls_pkcs11_token_set_pin` function, used for changing the Security Officer PIN, can lead to a use-after-free vulnerability. This occurs when an attacker attempts to change the PIN with a NULL old PIN for a token that lacks a protected authentication path.
Затронутые продукты
Ссылки
- CVE-2026-42014
- SUSE Bug 1263713
Описание
A flaw was found in gnutls. An off-by-one error exists in the PKCS#12 bag element bounds check. This vulnerability allows an remote attacker to write past the internal array of a PKCS#12 bag when appending to a bag that already contains 32 elements. This memory corruption could lead to a denial of service (DoS) or potentially other unspecified impacts.
Затронутые продукты
Ссылки
- CVE-2026-42015
- SUSE Bug 1263714
Описание
A flaw was found in libgnutls. A remote attacker, by sending an extremely short premaster secret during an RSA key exchange to a server using an RSA key backed by a PKCS#11 token, could trigger a short heap overread. This memory corruption vulnerability could lead to information disclosure.
Затронутые продукты
Ссылки
- CVE-2026-5260
- SUSE Bug 1263715