SB2019011509 - Ubuntu update for HAProxy
Published: January 15, 2019 Updated: January 22, 2019
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 vulnerabilities.
1) Out-of-bounds read (CVE-ID: CVE-2018-20102)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote attacker to obtain potentially sensitive information on the target system.
The vulnerability exists due to improper checking of valid DNS responses by the dns_validate_dns_response function, as defined in the dns.c source code file. A remote attacker can send a specially crafted request that submits malicious input, trigger an out-of-bounds read access and obtain sensitive information.
2) Infinite loop (CVE-ID: CVE-2018-20103)
CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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 vulnerability exists in the dns_read_name() function, as defined in the src/dns.c source code file due to an error when processing malicious input. A remote attacker can send a specially crafted packet that submits malicious input, make a compressed pointer point to itself trigger an infinite loop and cause the affected software to crash.
3) Out-of-bounds read (CVE-ID: CVE-2018-20615)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to incorrect frame length validation when processing headers with priority flags set. A remote attacker can send a specially crafted HTTP/2 request, trigger our-of-bounds read and crash the affected application.
Remediation
Install update from vendor's website.