SB2019071804 - Ubuntu update for Squid
Published: July 18, 2019
Security Bulletin ID
SB2019071804
Severity
Medium
Patch available
YES
Number of vulnerabilities
3
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 secuirty vulnerabilities.
1) NULL pointer derefenrece (CVE-ID: CVE-2018-1000024)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.The vulnerability exists due to incorrect pointer handling when processing ESI responses. A remote attacker can supply a specially crafted response to the vulnerable server and trigger application crash.
2) Denial of service (CVE-ID: CVE-2018-1000027)
The vulnerability allows a remote attacker to cause DoS condition on the target system.The weakness exists due to unspecified error. A remote attacker can cause denial of service issue in HTTP Message processing.
3) Cross-site scripting (CVE-ID: CVE-2019-13345)
The vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data passed via the the "user_name" and "auth" parameters to the cachemgr.cgi web module. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.
Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.
Example:
http://[host]/cgi-bin/cachemgr.cgi?host=localhost&port=3128&user_name=admin&operation=authenticate&auth=bG9jYWxob3N0fDE1NTg5NTYzNzJ8YWRtIj48c2NyaXB0PmFsZXJ0KCdYU1MnKTwvc2NyaXB0PmlufGRzZGFkYWE=
Remediation
Install update from vendor's website.