SB2017121702 - Arch Linux update for lib32-openssl-1.0
Published: December 17, 2017
Security Bulletin ID
SB2017121702
Severity
Medium
Patch available
YES
Number of vulnerabilities
5
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 5 secuirty vulnerabilities.
1) Out-of-bounds read (CVE-ID: CVE-2017-3735)
The vulnerability allows a remote attacker to perform spoofing attack.
The vulnerability exists due to one-byte out-of-bounds read when parsing an IPAddressFamily extension in an X.509 certificate. A remote attacker can disguise text display of the certificate.
2) Carry propagation issue (CVE-ID: CVE-2017-3736)
The vulnerability allows a remote attacker to decrypt data.The vulnerability exists due to carry propagating bug in the x86_64 Montgomery squaring procedure (bn_sqrx8x_internal). A remote attacker can decrypt encrypted data. The vulnerability affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen.
3) Improper input validation (CVE-ID: CVE-2017-3737)
The vulnerability allows a remote attacker to gain access to potentially sensitive information on the target system.The weakness exists due to an "error state mechanism" when SSL_read() or SSL_write() is called directly after SSL object. A remote attacker can a specially crafted input, trigger a fatal error during a handshake and return it in the initial function call to access or modify sensitive information.
4) Buffer overflow (CVE-ID: CVE-2017-3738)
The vulnerability allows a remote attacker to obtain potentially sensitive information on the target system.The weakness exists due to buffer overflow in the AVX2 Montgomery multiplication procedure used in exponentiation with 1024-bit moduli. A remote attacker can cause the server to share the DH1024 private key among multiple clients and perform attack on TLS.
5) Information disclosure (CVE-ID: CVE-2016-0701)
The vulnerability allows a remote attacker to obtain potentially sensitive information.The vulnerability exists due to DH_check_pub_key() function in crypto/dh/dh_check.c in OpenSSL 1.0.2 before 1.0.2f does not ensure that prime numbers are appropriate for Diffie-Hellman (DH) key exchange, which makes it easier for remote attackers to discover a private DH exponent by making multiple handshakes with a peer that chose an inappropriate number, as demonstrated by a number in an X9.42 file.
Remediation
Install update from vendor's website.