SB2022080844 - Anolis OS update for squid
Published: August 8, 2022 Updated: March 29, 2025
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 13 secuirty vulnerabilities.
1) Reachable Assertion (CVE-ID: CVE-2021-46784)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a reachable assertion when processing Gopher server responses. A remote attacker can send a specially crafted response to the proxy server and perform a denial of service (DoS) attack.
2) Out-of-bounds write (CVE-ID: CVE-2019-12519)
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a boundary error when handling the tag esi:when within ESIExpression::Evaluate. A remote attacker can pass specially crafted data to the application, trigger out-of-bounds write and execute arbitrary code on the target system.
3) Buffer overflow (CVE-ID: CVE-2019-12525)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input passed via the Proxy-Authorization header when Squid is configured to use HTTP Digest authentication . A remote attacker can send specially crafted HTTP request to the proxy server and perform denial of service attack.
4) Out-of-bounds read (CVE-ID: CVE-2019-12528)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition when translating FTP server listing into HTTP responses. A remote attacker can trick the victim into vising a specially crafted FTP server, trigger out-of-bounds read and gain access to memory contents of the heap.
5) Inconsistent interpretation of HTTP requests (CVE-ID: CVE-2020-15049)
The vulnerability allows a remote attacker to perform cache poisoning attack.
The vulnerability exists in the way Squid processes client's requests. A remote client can send specially crafted data in the request to perform request smuggling and poison the HTTP cache contents with crafted HTTP(S) request messages.
Successful exploitation of the vulnerability requires an upstream server to participate in the smuggling and generate the poison response sequence.
6) Resource exhaustion (CVE-ID: CVE-2020-24606)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to application does not properly EOF in peerDigestHandleReply() function in peer_digest.cc when processing Cache Digest response messages from a trusted peer. A remote attacker who controls a trusted peer can consume all available CPU cycles and perform a denial of service (DoS) attack.
This attack is limited to Squid using cache_peer with cache digests feature.
7) Input validation error (CVE-ID: CVE-2020-8449)
The vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to insufficient validation of user-supplied input when processing HTTP requests. A remote attacker can send a specially crafted HTTP request, bypass configured security filters and gain access to certain server resources.
8) Buffer overflow (CVE-ID: CVE-2020-8450)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing HTTP requests, when Squid is acting as a reverse proxy. A remote attacker can send a specially crafted HTTP request to the affected proxy server, trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
9) 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=
10) Integer overflow (CVE-ID: CVE-2020-11945)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to integer overflow when processing HTTP Digest Authentication tokens, if memory pooling is disabled. A remote attacker can pass a specially crafted authentication nonce and execute arbitrary code on the server through the free'd nonce credentials.
In case memory pooling is enabled, a remote attacker can replay a sniffed Digest Authentication nonce to gain access to resources that are otherwise forbidden.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
11) Inconsistent interpretation of HTTP requests (CVE-ID: CVE-2020-25097)
The vulnerability allows a remote attacker to preform HTTP request smuggling attacks.
The vulnerability exists due to improper validation of HTTP requests. A remote attacker can send a specially crafted HTTP request to the server and smuggle arbitrary HTTP headers.
Successful exploitation of vulnerability may allow an attacker to poison HTTP cache and perform phishing attacks.
12) Inconsistent interpretation of HTTP requests (CVE-ID: CVE-2020-15810)
The vulnerability allows a remote attacker to preform HTTP request smuggling attacks.
The vulnerability exists due to improper validation of HTTP requests. A remote authenticated attacker can send a specially crafted HTTP request to the server and smuggle arbitrary HTTP headers.
Successful exploitation of vulnerability may allow an attacker to poison HTTP cache and perform phishing attacks.
13) HTTP response splitting (CVE-ID: CVE-2020-15811)
The vulnerability allows a remote attacker to perform HTTP splitting attacks.
The vulnerability exists due to software does not corrector process CRLF character sequences. A remote authenticated attacker can send specially crafted request containing CRLF sequence and make the application to send a split HTTP response.
Successful exploitation of the vulnerability may allow an attacker perform cache poisoning attack.
Remediation
Install update from vendor's website.