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CVE-2024-39920

UNKNOWN
Published 2024-07-03T00:00:00
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Expert Analysis

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CVSS Score

V3.1
4.3
/10
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.001
probability
of exploitation in the wild

There is a 0.1% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.154
Higher than 15.4% of all CVEs

Attack Vector Metrics

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED

Impact Metrics

Confidentiality
LOW
Integrity
NONE
Availability
NONE

Description

The TCP protocol in RFC 9293 has a timing side channel that makes it easier for remote attackers to infer the content of one TCP connection from a client system (to any server), when that client system is concurrently obtaining TCP data at a slow rate from an attacker-controlled server, aka the "SnailLoad" issue. For example, the attack can begin by measuring RTTs via the TCP segments whose role is to provide an ACK control bit and an Acknowledgment Number.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

ietf

tcp

Affected Versions:

9293

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

⚠ Unreviewed MODERATE

GHSA-796p-jr7h-8vmq

Advisory Details

The TCP protocol in RFC 9293 has a timing side channel that makes it easier for remote attackers to infer the content of one TCP connection from a client system (to any server), when that client system is concurrently obtaining TCP data at a slow rate from an attacker-controlled server, aka the "SnailLoad" issue. For example, the attack can begin by measuring RTTs via the TCP segments whose role is to provide an ACK control bit and an Acknowledgment Number.

CVSS Scoring

CVSS Score

5.0

CVSS Vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2024-39920
WEB https://github.com/IAIK/SnailLoad
WEB https://news.ycombinator.com/item?id=40809629
WEB https://twitter.com/tugraz/status/1805272833322299412
WEB https://www.instagram.com/p/C8wpO1UtExw
WEB https://www.rfc-editor.org/rfc/rfc9293.txt
WEB https://www.snailload.com
WEB https://www.snailload.com/snailload.pdf
WEB https://www.tugraz.at/en/tu-graz/services/news-stories/tu-graz-news/singleview/article/neue-sicherheitsluecke-erlaubt-ueberwachung-besuchter-websites-und-angesehener-videos

Advisory provided by GitHub Security Advisory Database. Published: July 3, 2024, Modified: August 5, 2024

References

https://www.snailload.com
https://www.snailload.com/snailload.pdf
https://github.com/IAIK/SnailLoad
https://www.rfc-editor.org/rfc/rfc9293.txt
https://www.tugraz.at/en/tu-graz/services/news-stories/tu-graz-news/singleview/article/neue-sicherheitsluecke-erlaubt-ueberwachung-besuchter-websites-und-angesehener-videos
https://twitter.com/tugraz/status/1805272833322299412
https://news.ycombinator.com/item?id=40809629
https://www.instagram.com/p/C8wpO1UtExw/
Published: 2024-07-03T00:00:00
Last Modified: 2024-08-05T18:37:40.784Z
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