SB2019073119 - Red Hat Enterprise Linux 8 update for nss and nspr
Published: July 31, 2019
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 4 secuirty vulnerabilities.
1) NULL pointer dereference (CVE-ID: CVE-2018-18508)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error in Mozilla NSS within the CMS (Cryptographic Message Syntax) API. A remote attacker can perform a denial of service (DoS) attack.
2) Out-of-bounds read (CVE-ID: CVE-2019-11719)
The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.
When importing a curve25519 private key in PKCS#8format with leading 0x00 bytes, it is possible to trigger an out-of-bounds read in the Network Security Services (NSS) library. This could lead to information disclosure. This vulnerability affects Firefox ESR < 60.8, Firefox < 68, and Thunderbird < 60.8.
3) Improper Certificate Validation (CVE-ID: CVE-2019-11727)
The vulnerability allows a remote attacker to perform MitM attack.
The vulnerability exists doe to an error within the Mozilla NSS library, when working with TLS certificates. A remote attacker can force Network Security Services (NSS) to sign CertificateVerify with
PKCS#1 v1.5 signatures when those are the only ones advertised by server
in CertificateRequest in TLS 1.3. A remote attacker can perform a Man-in-the-Middle attack and gain access to sensitive information.
4) Input validation error (CVE-ID: CVE-2019-11729)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input when processing an empty or malformed p256-ECDH public keys. A remote attacker can trigger a segmentation fault and cause a denial of service condition on the target system.
Remediation
Install update from vendor's website.