SB2020031512 - Gentoo update for cURL
Published: March 15, 2020
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 4 secuirty vulnerabilities.
1) Integer overflow (CVE-ID: CVE-2019-5435)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to integer overflow in curl_url_set() function on 32-bit systems. A remote attacker can pass an overly long URL to the affected application, trigger integer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
2) Heap-based buffer overflow (CVE-ID: CVE-2019-5436)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing responses from TFTP server in the tftp_receive_packet() function. A remote attacker can trick the victim to send a request to a malicious TFTP server, trigger heap-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
3) Double Free (CVE-ID: CVE-2019-5481)
The vulnerability allows a remote attacker to perform denial of service (DoS) attack.
The vulnerability exists due to a boundary error when processing very large blocks during Kerberos FTP data transfer. A remote attacker that controls malicious FTP server can send large blocks of data to the curl client, trigger a double-free error and crash the application.
4) Heap-based buffer overflow (CVE-ID: CVE-2019-5482)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error within the tftp_receive_packet() function when processing TFTP data. A remote attacker can send specially crafted TFTP response to the vulnerable curl client, trigger heap-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Remediation
Install update from vendor's website.