Vulnerability Details : CVE-2015-2689
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.
Vulnerability category: Input validationDenial of service
Products affected by CVE-2015-2689
- cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:*
- cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2015-2689
0.20%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 57 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2015-2689
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:N/A:P |
10.0
|
2.9
|
NIST | |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
NIST |
CWE ids for CVE-2015-2689
-
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.Assigned by: nvd@nist.gov (Primary)
References for CVE-2015-2689
-
https://lists.torproject.org/pipermail/tor-talk/2015-March/037281.html
[tor-talk] Pre-announcement: source for Tor 0.2.4.26 and 0.2.5.11 is available.Mailing List;Vendor Advisory
-
https://trac.torproject.org/projects/tor/ticket/14129
#14129 (Assertion failure in dns.c, possibly connected to UDP DoS attack) – Tor Bug Tracker & WikiPatch;Vendor Advisory
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