Tor up to 0.2.8.11 Hidden Service Descriptor memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability was found in Tor up to 0.2.8.11. It has been classified as problematic. Affected by this issue is some unknown functionality of the component Hidden Service Descriptor Handler. Performing a manipulation results in memory corruption. This vulnerability is cataloged as CVE-2016-1254. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Tor up to 0.2.8.11 (Network Encryption Software). This affects an unknown code block of the component Hidden Service Descriptor Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on availability. The summary by CVE is:

Tor before 0.2.8.12 might allow remote attackers to cause a denial of service (client crash) via a crafted hidden service descriptor.

The bug was discovered 12/19/2016. The weakness was shared 12/05/2017 (Website). It is possible to read the advisory at debian.org. This vulnerability is uniquely identified as CVE-2016-1254 since 12/27/2015. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 95956 (Debian DSA-3741-1 : tor - security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 169619 (OpenSuSE Security Update for tor (openSUSE-SU-2016:3281-1)).

Upgrading to version 0.2.8.12 eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (95956). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 95956
Nessus Name: Debian DSA-3741-1 : tor - security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 867773
OpenVAS Name: Fedora Update for tor FEDORA-2016-95b4e9077e
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Tor 0.2.8.12
Patch: gitweb.torproject.org

Timelineinfo

12/27/2015 🔍
12/19/2016 +358 days 🔍
12/20/2016 +1 days 🔍
12/21/2016 +1 days 🔍
12/05/2017 +349 days 🔍
12/05/2017 +0 days 🔍
12/05/2017 +0 days 🔍
01/17/2023 +1869 days 🔍

Sourcesinfo

Advisory: 21018
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-1254 (🔍)
GCVE (CVE): GCVE-0-2016-1254
GCVE (VulDB): GCVE-100-110199

OVAL: 🔍

Entryinfo

Created: 12/05/2017 21:39
Updated: 01/17/2023 08:13
Changes: 12/05/2017 21:39 (73), 12/12/2019 09:12 (2), 01/17/2023 08:10 (5), 01/17/2023 08:13 (1)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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