Apache Tomcat on Debian/Ubuntu Ppostinst Script link following

CVSS Meta Temp Score
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CTI Interest Score
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7.6$0-$5k0.00

Summaryinfo

A vulnerability has been found in Apache Tomcat on Debian/Ubuntu and classified as critical. This issue affects some unknown processing of the component Ppostinst Script. The manipulation leads to link following. This vulnerability is referenced as CVE-2016-9774. The attack can only be performed from a local environment. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Apache Tomcat on Debian/Ubuntu (Application Server Software) (the affected version unknown) and classified as critical. This issue affects an unknown part of the component Ppostinst Script. The manipulation with an unknown input leads to a link following vulnerability. Using CWE to declare the problem leads to CWE-59. The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The postinst script in the tomcat6 package before 6.0.45+dfsg-1~deb7u4 on Debian wheezy, before 6.0.35-1ubuntu3.9 on Ubuntu 12.04 LTS and on Ubuntu 14.04 LTS; the tomcat7 package before 7.0.28-4+deb7u8 on Debian wheezy, before 7.0.56-3+deb8u6 on Debian jessie, before 7.0.52-1ubuntu0.8 on Ubuntu 14.04 LTS, and on Ubuntu 12.04 LTS, 16.04 LTS, and 16.10; and the tomcat8 package before 8.0.14-1+deb8u5 on Debian jessie, before 8.0.32-1ubuntu1.3 on Ubuntu 16.04 LTS, before 8.0.37-1ubuntu0.1 on Ubuntu 16.10, and before 8.0.38-2ubuntu1 on Ubuntu 17.04 might allow local users with access to the tomcat account to obtain sensitive information or gain root privileges via a symlink attack on the Catalina localhost directory.

The bug was discovered 12/02/2016. The weakness was published 03/23/2017 by Paul Szabo (oss-sec). The advisory is shared at openwall.com. The identification of this vulnerability is CVE-2016-9774 since 12/02/2016. An attack has to be approached locally. A simple authentication is necessary for exploitation. Neither technical details nor an exploit are publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 111 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 900016 , which helps to determine the existence of the flaw in a target environment. The commercial vulnerability scanner Qualys is able to test this issue with plugin 175914 (Debian Security Update for tomcat8 (DSA 3739-1)).

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (900016) and SecurityFocus (BID 94643†). Similar entry is available at VDB-98466. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.6

VulDB Base Score: 7.8
VulDB Temp Score: 7.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Link following
CWE: CWE-59
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 900016
Nessus File: 🔍

OpenVAS ID: 703738
OpenVAS Name: Debian Security Advisory DSA 3738-1 (tomcat7 - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/02/2016 🔍
12/02/2016 +0 days 🔍
12/02/2016 +0 days 🔍
03/23/2017 +111 days 🔍
03/23/2017 +0 days 🔍
03/24/2017 +1 days 🔍
11/14/2022 +2061 days 🔍

Sourcesinfo

Vendor: apache.org

Advisory: USN-3177-1
Researcher: Paul Szabo
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-9774 (🔍)
GCVE (CVE): GCVE-0-2016-9774
GCVE (VulDB): GCVE-100-98465

OVAL: 🔍

SecurityFocus: 94643 - Debian Tomcat Package Multiple Local Privilege Escalation Vulnerabilities
OSVDB: - CVE-2016-9774 - Apache - Tomcat - Symlink Issue

See also: 🔍

Entryinfo

Created: 03/24/2017 07:15
Updated: 11/14/2022 16:11
Changes: 03/24/2017 07:15 (77), 11/14/2022 16:11 (3)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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