CVE-2017-8820

Severity Score

7.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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, remote attackers can cause a denial of service (NULL pointer dereference and application crash) against directory authorities via a malformed descriptor, aka TROVE-2017-010.

En Tor, en versiones anteriores a la 0.2.5.16; de la versión 0.2.6 hasta la 0.2.8 anterior a la 0.2.8.17, versiones 0.2.9 anteriores a la 0.2.9.14; versiones 0.3.0 anteriores a la 0.3.0.13 y versiones 0.3.1 anteriores a la 0.3.1.9, los atacantes remotos pueden provocar una denegación de servicio (desreferencia de puntero NULL y cierre inesperado de la aplicación) contra autoridades de directorio mediante un descriptor mal formado. Esto también se conoce como TROVE-2017-010.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2017-05-07 CVE Reserved
2017-12-03 CVE Published
2023-06-29 EPSS Updated
2024-08-05 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-476: NULL Pointer Dereference

CAPEC

References (3)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://blog.torproject.org/new-stable-tor-releases-security-fixes-0319-03013-02914-02817-02516	2017-12-21
https://bugs.torproject.org/24245	2017-12-21
https://www.debian.org/security/2017/dsa-4054	2017-12-21

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Tor Project Search vendor "Tor Project"		Tor Search vendor "Tor Project" for product "Tor"				< 0.2.5.16 Search vendor "Tor Project" for product "Tor" and version " < 0.2.5.16"		-		Affected
Tor Project Search vendor "Tor Project"		Tor Search vendor "Tor Project" for product "Tor"				>= 0.2.6 < 0.2.8.17 Search vendor "Tor Project" for product "Tor" and version " >= 0.2.6 < 0.2.8.17"		-		Affected
Tor Project Search vendor "Tor Project"		Tor Search vendor "Tor Project" for product "Tor"				>= 0.2.9 < 0.2.9.14 Search vendor "Tor Project" for product "Tor" and version " >= 0.2.9 < 0.2.9.14"		-		Affected
Tor Project Search vendor "Tor Project"		Tor Search vendor "Tor Project" for product "Tor"				>= 0.3.0 < 0.3.0.13 Search vendor "Tor Project" for product "Tor" and version " >= 0.3.0 < 0.3.0.13"		-		Affected
Tor Project Search vendor "Tor Project"		Tor Search vendor "Tor Project" for product "Tor"				>= 0.3.1 < 0.3.1.9 Search vendor "Tor Project" for product "Tor" and version " >= 0.3.1 < 0.3.1.9"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				8.0 Search vendor "Debian" for product "Debian Linux" and version "8.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0"		-		Affected