SB2018112902 - Gentoo update for OpenSSL
Published: November 29, 2018
Security Bulletin ID
SB2018112902
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
3
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 vulnerabilities.
1) Improper authentication (CVE-ID: CVE-2018-0733)
CWE-ID: CWE-287 - Improper Authentication
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote attacker to modify potentially sensitive information on the target system.
Th weakness exists in the PA-RISC CRYPTO_memcmp function due to improper authentication. A remote attacker can write arbitrary data.
2) Information disclosure (CVE-ID: CVE-2018-0737)
CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local attacker to obtain potentially sensitive information on the target system.
The weakness exists in the RSA key generation algorithm's BN_mod_inverse() and BN_mod_exp_mont() functions due to a cache timing side channel attack. A local attacker can recover the private key.
3) Resource exhaustion (CVE-ID: CVE-2018-0739)
CWE-ID: CWE-400 - Resource exhaustion
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote attacker to cause DoS condition on the target system.
The weakness exists due to excessive stack memory consumption. A remote attacker can cause the service to crash.
Remediation
Install update from vendor's website.