CVE-2015-2689
Published: 24 January 2020
Tor before 0.2.4.26 and 0.2.5.x before 0.2.5.11 does not properly handle pending-connection resolve states during periods of high DNS load, which allows remote attackers to cause a denial of service (assertion failure and daemon exit) via crafted packets.
Notes
| Author | Note |
|---|---|
| sbeattie | DoS due to DNS triggering an abort |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
tor Launchpad, Ubuntu, Debian |
lucid |
Does not exist
|
| precise |
Ignored
(end of life)
|
|
| trusty |
Released
(0.2.4.27-1build0.14.04.1)
|
|
| upstream |
Released
(0.2.5.11-1)
|
|
| utopic |
Ignored
(end of life)
|
|
| vivid |
Released
(0.2.5.12-1build0.15.04.1)
|
|
| wily |
Not vulnerable
(0.2.6.10-1)
|
|
| xenial |
Not vulnerable
(0.2.6.10-1)
|
|
| yakkety |
Not vulnerable
(0.2.6.10-1)
|
|
| zesty |
Not vulnerable
(0.2.6.10-1)
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.5 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |