This vulnerability allows remote attackers to deny service on vulnerable installations of The Squid Software Foundation Squid 3.5.27-20180318. Authentication is not required to exploit this vulnerability. The specific flaw exists within ClientRequestContext::sslBumpAccessCheck(). A crafted request can trigger the dereference of a null pointer. An attacker can leverage this vulnerability to create a denial-of-service condition to users of the system. Was ZDI-CAN-6088.

The version of tested product installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2020-1486 advisory.

  - This vulnerability allows remote attackers to deny service on vulnerable installations of The Squid     Software Foundation Squid 3.5.27-20180318. Authentication is not required to exploit this vulnerability.
    The specific flaw exists within ClientRequestContext::sslBumpAccessCheck(). A crafted request can trigger     the dereference of a null pointer. An attacker can leverage this vulnerability to create a denial-of-     service condition to users of the system. Was ZDI-CAN-6088. (CVE-2018-1172)

  - An issue was discovered in Squid before 4.10. It allows a crafted FTP server to trigger disclosure of     sensitive information from heap memory, such as information associated with other users' sessions or non-     Squid processes. (CVE-2019-12528)

  - An issue was discovered in Squid 2.x, 3.x, and 4.x through 4.8. Due to incorrect data management, it is     vulnerable to information disclosure when processing HTTP Digest Authentication. Nonce tokens contain the     raw byte value of a pointer that sits within heap memory allocation. This information reduces ASLR     protections and may aid attackers isolating memory areas to target for remote code execution attacks.
    (CVE-2019-18679)

  - An issue was discovered in Squid before 4.10. Due to incorrect buffer management, a remote client can     cause a buffer overflow in a Squid instance acting as a reverse proxy. (CVE-2020-8450)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

According to its banner, the version of Squid running on the remote host is 3.1.x after or equal to 3.1.12.2 and prior or equal to 3.1.23, 3.2.x after or equal to 3.2.0.8 and prior or equal to 3.2.0.8, 3.3.x, 3.4.x, 3.5.x prior or equal to 3.5.27, or 4.x prior to 4.0.13. It is, therefore, affected by a denial of service (DoS) vulnerability in the ESI response processing component due to incorrect pointer handling. A remote attacker controlled server can exploit this issue, via a crafted ESI response, to cause a denial of service for all clients accessing the Squid service.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

This update for squid3 fixes the following issues :

  - CVE-2018-1172: Fixed a DoS caused by incorrect handling     of ESI responses. (bsc#1090089, SQUID-2018:3)

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

This update fixes the following issues :

  - CVE-2018-1172: Squid Proxy Cache Denial of Service     vulnerability (bsc#1090089).

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

This update fixes the following issues :

  - CVE-2018-1172: Squid Proxy Cache Denial of Service     vulnerability (bsc#1090089). This update was imported     from the SUSE:SLE-12-SP2:Update update project.

ID	Name	Product	Family	Severity
140199	Amazon Linux 2 : squid (ALAS-2020-1486)	Nessus	Amazon Linux Local Security Checks	high
119725	Squid 3.1.12.2 <= 3.1.x <= 3.1.23 / 3.2.0.8 <= 3.2.x <= 3.2.14 / 3.3.x / 3.4.x / 3.5.x <= 3.5.27 / 4.x < 4.0.13 Denial of Service Vulnerability (SQUID-2018:3)	Nessus	Firewalls	medium
110032	SUSE SLES11 Security Update : squid3 (SUSE-SU-2018:1365-1)	Nessus	SuSE Local Security Checks	medium
109547	SUSE SLES12 Security Update : squid (SUSE-SU-2018:1122-1)	Nessus	SuSE Local Security Checks	medium
109537	openSUSE Security Update : squid (openSUSE-2018-412)	Nessus	SuSE Local Security Checks	medium

Detections

Analytics

CVE-2018-1172

medium

Tenable Plugins

high

medium

medium

medium

medium