Tor up to 0.2.5.15/0.2.8.16/0.2.9.13/0.3.0.12/0.3.1.8 Downloaded Descriptor Anonymity path error
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
3.6 | $0-$5k | 0.00 |
A vulnerability was found in Tor up to 0.2.5.15/0.2.8.16/0.2.9.13/0.3.0.12/0.3.1.8 (Network Encryption Software) and classified as problematic. This issue affects some unknown processing of the component Downloaded Descriptor Handler. The manipulation with an unknown input leads to a path error vulnerability (Anonymity). Using CWE to declare the problem leads to CWE-417. Impacted is confidentiality. The summary by CVE is:
In Tor before 0.2.5.16, 0.2.6 through 0.2.8 before 0.2.8.17, 0.2.9 before 0.2.9.14, 0.3.0 before 0.3.0.13, and 0.3.1 before 0.3.1.9, relays (that have incompletely downloaded descriptors) can pick themselves in a circuit path, leading to a degradation of anonymity, aka TROVE-2017-012.
The bug was discovered 12/01/2017. The weakness was published 12/01/2017 as TROVE-2017-012 as confirmed blog post (Website). The advisory is shared at blog.torproject.org. The blog post contains:
There are new stable releases today, fixing the following security issues.The identification of this vulnerability is CVE-2017-8822 since 05/07/2017. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available.
The vulnerability scanner Nessus provides a plugin with the ID 104975 (Debian DSA-4054-1 : 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 176234 (Debian Security Update for tor (DSA 4054-1)).
Upgrading to version 0.2.5.16, 0.2.8.17, 0.2.8.14, 0.3.0.13 or 0.3.1.9 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability. The blog post contains the following remark:
Tor 0.3.1.9 backports important security and stability fixes from the 0.3.2 development series. All Tor users should upgrade to this release, or to another of the releases coming out today.
The vulnerability is also documented in the vulnerability database at Tenable (104975). Similar entries are available at 110162, 110163, 110164 and 110166.
Product
Type
Name
Version
- 0.2.5.0
- 0.2.5.1
- 0.2.5.2
- 0.2.5.3
- 0.2.5.4
- 0.2.5.5
- 0.2.5.6
- 0.2.5.7
- 0.2.5.8
- 0.2.5.9
- 0.2.5.10
- 0.2.5.11
- 0.2.5.12
- 0.2.5.13
- 0.2.5.14
- 0.2.5.15
- 0.2.8.0
- 0.2.8.1
- 0.2.8.2
- 0.2.8.3
- 0.2.8.4
- 0.2.8.5
- 0.2.8.6
- 0.2.8.7
- 0.2.8.8
- 0.2.8.9
- 0.2.8.10
- 0.2.8.11
- 0.2.8.12
- 0.2.8.13
- 0.2.8.14
- 0.2.8.15
- 0.2.8.16
- 0.2.9.0
- 0.2.9.1
- 0.2.9.2
- 0.2.9.3
- 0.2.9.4
- 0.2.9.5
- 0.2.9.6
- 0.2.9.7
- 0.2.9.8
- 0.2.9.9
- 0.2.9.10
- 0.2.9.11
- 0.2.9.12
- 0.2.9.13
- 0.3.0.0
- 0.3.0.1
- 0.3.0.2
- 0.3.0.3
- 0.3.0.4
- 0.3.0.5
- 0.3.0.6
- 0.3.0.7
- 0.3.0.8
- 0.3.0.9
- 0.3.0.10
- 0.3.0.11
- 0.3.0.12
- 0.3.1.0
- 0.3.1.1
- 0.3.1.2
- 0.3.1.3
- 0.3.1.4
- 0.3.1.5
- 0.3.1.6
- 0.3.1.7
- 0.3.1.8
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 3.7VulDB Meta Temp Score: 3.6
VulDB Base Score: 3.7
VulDB Temp Score: 3.6
VulDB Vector: 🔍
VulDB Reliability: 🔍
NVD Base Score: 3.7
NVD Vector: 🔍
CVSSv2
AV | AC | Au | C | I | A |
---|---|---|---|---|---|
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
---|---|---|---|---|---|
unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
NVD Base Score: 🔍
Exploiting
Name: AnonymityClass: Path error / Anonymity
CWE: CWE-417
ATT&CK: Unknown
Local: No
Remote: Yes
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
---|---|---|---|---|
Today | unlock | unlock | unlock | unlock |
Nessus ID: 104975
Nessus Name: Debian DSA-4054-1 : tor - security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
OpenVAS ID: 703791
OpenVAS Name: Debian Security Advisory DSA 4054-1 (tor - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍
Qualys ID: 🔍
Qualys Name: 🔍
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Upgrade: Tor 0.2.5.16/0.2.8.17/0.2.8.14/0.3.0.13/0.3.1.9
Timeline
05/07/2017 🔍12/01/2017 🔍
12/01/2017 🔍
12/01/2017 🔍
12/03/2017 🔍
12/03/2017 🔍
12/04/2017 🔍
12/11/2019 🔍
Sources
Advisory: TROVE-2017-012Status: Confirmed
Confirmation: 🔍
CVE: CVE-2017-8822 (🔍)
OVAL: 🔍
See also: 🔍
Entry
Created: 12/03/2017 15:04Updated: 12/11/2019 21:29
Changes: 12/03/2017 15:04 (79), 12/11/2019 21:29 (2)
Complete: 🔍
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