CVE-2015-2689
HIGH
7.5
CVSS Score
Published: January 24, 2020 at 05:46 PM UTC
Updated: June 17, 2026 at 12:24 AM UTC
2 products affected across 2 vendorsTorTor
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Severity
HIGH7.5
Exploit prediction
EPSS 2%
Description
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 0.2.4.260.2.5.1 ≤ v < 0.2.5.11
Affected range stops below 0.2.4.26, so it looks safe — our inference, not a vendor statement
Affected range stops below 0.2.5.11, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (2)
x_refsource_MISCMailing ListVendor Advisory
Source: [email protected]
https://lists.torproject.org/pipermail/tor-talk/2015-March/037281.htmlx_refsource_MISCPatchVendor Advisory
Source: [email protected]
https://trac.torproject.org/projects/tor/ticket/14129CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-20
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