An issue was discovered in DAViCal Andrew's Web Libraries (AWL) through 0.60. Session management does not use a sufficiently hard-to-guess session key. Anyone who can guess the microsecond time (and the incrementing session_id) can impersonate a session.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - An issue was discovered in DAViCal Andrew's Web Libraries (AWL) through 0.60. Session management does not     use a sufficiently hard-to-guess session key. Anyone who can guess the microsecond time (and the     incrementing session_id) can impersonate a session. (CVE-2020-11728)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote Ubuntu 20.04 LTS host has a package installed that is affected by a vulnerability as referenced in the USN-4539-1 advisory.

    Andrew Bartlett discovered that DAViCal Andrew's Web Libraries (AWL) did not properly manage session keys.
    An attacker could possibly use this issue to impersonate a session. (CVE-2020-11728)

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.

Andrew Bartlett discovered that awl, DAViCal Andrew's Web Libraries, did not properly handle session management: this would allow a malicious user to impersonate other sessions or users.

Following CVEs were reported against the awl source package :

CVE-2020-11728

An issue was discovered in DAViCal Andrew's Web Libraries (AWL) through 0.60. Session management does not use a sufficiently hard-to-guess session key. Anyone who can guess the microsecond time (and the incrementing session_id) can impersonate a session.

CVE-2020-11729

An issue was discovered in DAViCal Andrew's Web Libraries (AWL) through 0.60. Long-term session cookies, uses to provide long-term session continuity, are not generated securely, enabling a brute-force attack that may be successful.

For Debian 8 'Jessie', these problems have been fixed in version 0.55-1+deb8u1.

We recommend that you upgrade your awl packages.

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

ID	Name	Product	Family	Severity
257545	Linux Distros Unpatched Vulnerability : CVE-2020-11728	Nessus	Misc.	high
140788	Ubuntu 20.04 LTS : AWL vulnerability (USN-4539-1)	Nessus	Ubuntu Local Security Checks	high
135878	Debian DSA-4660-1 : awl - security update	Nessus	Debian Local Security Checks	critical
135721	Debian DLA-2178-1 : awl security update	Nessus	Debian Local Security Checks	critical

Detections

Analytics

CVE-2020-11728

high

Tenable Plugins

high

high

critical

critical