Improper input validation together with an integer overflow in the EAP-TLS protocol implementation in PPPD may cause a crash, information disclosure, or authentication bypass. This implementation is distributed as a patch for PPPD 0.91, and includes the affected eap.c and eap-tls.c files. Configurations that use the `refuse-app` option are unaffected.

The remote Redhat Enterprise Linux 7 host has one or more packages installed that are affected by multiple vulnerabilities that have been acknowledged by the vendor but will not be patched.

  - ppp: Remote client crash in ppp EAP-TLS patch (CVE-2018-11574)

  - Integer overflow in the getword function in options.c in pppd in Paul's PPP Package (ppp) before 2.4.7     allows attackers to access privileged options via a long word in an options file, which triggers a heap-     based buffer overflow that [corrupts] security-relevant variables. (CVE-2014-3158)

  - Buffer overflow in the rc_mksid function in plugins/radius/util.c in Paul's PPP Package (ppp) 2.4.6 and     earlier, when the PID for pppd is greater than 65535, allows remote attackers to cause a denial of service     (crash) via a start accounting message to the RADIUS server. (CVE-2015-3310)

Note that Nessus has not tested for these issues but has instead relied on the package manager's report that the package is installed.

According to the version of the ppp package installed, the EulerOS installation on the remote host is affected by the following vulnerability :

  - Improper input validation together with an integer     overflow in the EAP-TLS protocol implementation in PPPD     may cause a crash, information disclosure, or     authentication bypass. This implementation is     distributed as a patch for PPPD 0.91, and includes the     affected eap.c and eap-tls.c files. Configurations that     use the `refuse-app` option are     unaffected.(CVE-2018-11574)

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

This is an fix for CVE-2018-11574.

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

The remote Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-3810-1 advisory.

    Ivan Gotovchits discovered that ppp incorrectly handled the EAP-TLS protocol. A remote attacker could use     this issue to cause ppp to crash, resulting in a denial of service, or possibly bypass authentication.

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

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

ID	Name	Product	Family	Severity
198776	RHEL 7 : ppp (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	critical
149128	EulerOS 2.0 SP3 : ppp (EulerOS-SA-2021-1834)	Nessus	Huawei Local Security Checks	critical
142300	EulerOS 2.0 SP2 : ppp (EulerOS-SA-2020-2387)	Nessus	Huawei Local Security Checks	critical
120707	Fedora 28 : ppp (2018-aed26fc705)	Nessus	Fedora Local Security Checks	critical
118796	Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS : ppp vulnerability (USN-3810-1)	Nessus	Ubuntu Local Security Checks	critical
110790	Fedora 27 : ppp (2018-b99d43ee9b)	Nessus	Fedora Local Security Checks	critical

Detections

Analytics

CVE-2018-11574

critical

Tenable Plugins

critical

critical

critical

critical

critical

critical