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veracodeVeracode Vulnerability DatabaseVERACODE:44732
HistoryDec 19, 2023 - 6:46 a.m.

Rogue Session Attack (Terrapin)

2023-12-1906:46:15
Veracode Vulnerability Database
sca.analysiscenter.veracode.com
42
rogue session attack
terrapin
asyncssh-pypi
ssh security downgrade
malicious negotiation

CVSS3

5.9

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

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

AI Score

6.5

Confidence

High

EPSS

0.965

Percentile

99.6%

ssh is vulnerable to Terrapin attack. The vulnerability is due to mishandling of the handshake phase and sequence numbers in the SSH Binary Packet Protocol (BPP) with certain OpenSSH extensions. This allows an attacker to bypass integrity checks and omit packets during extension negotiation, and potentially leads to disabled security features in SSH connections.

References

CVSS3

5.9

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

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

AI Score

6.5

Confidence

High

EPSS

0.965

Percentile

99.6%