SB2017061330 - Ubuntu update for GnuTLS
Published: June 13, 2017
Security Bulletin ID
SB2017061330
Severity
Medium
Patch available
YES
Number of vulnerabilities
2
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 secuirty vulnerabilities.
1) Null pointer dereference (CVE-ID: CVE-2017-7507)
The vulnerability allows a remote attacker to cause DoS condition on the target system.The weakness exists due to NULL pointer dereference while decoding a status response TLS extension with valid contents. A remote attacker can send specially crafted status_request extension in a ClientHello message to cause the GnuTLS server application to crash.
Successful exploitation of the vulnerability results in denial of service.
2) Denial of service (CVE-ID: CVE-2017-7869)
The vulnerability allows a remote unauthenticated attacker to cause Dos condition on the target system.The weakness exists due to improper memory processing in the opencdk/read-packet.c of the cdk_pkt_read function. A remote attacker can send a specially crafted OpenPGP certificate, trigger buffer overflow, integer overflow or NULL pointer dereference and cause the server application to crash.
Successful exploitation of the vulnerability results in denial of service.
Remediation
Install update from vendor's website.