CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H
AI Score
Confidence
High
EPSS
Percentile
13.8%
A race condition vulnerability was discovered in how signals are handled by OpenSSH’s server (sshd). If a remote attacker does not authenticate within a set time period, then sshd’s SIGALRM handler is called asynchronously. However, this signal handler calls various functions that are not async-signal-safe, for example, syslog(). As a consequence of a successful attack, in the worst case scenario, an attacker may be able to perform a remote code execution (RCE) as an unprivileged user running the sshd server.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Debian | 12 | all | openssh | < 1:9.2p1-2+deb12u3 | openssh_1:9.2p1-2+deb12u3_all.deb |
Debian | 11 | all | openssh | < 1:8.4p1-5+deb11u3 | openssh_1:8.4p1-5+deb11u3_all.deb |
Debian | 999 | all | openssh | < 1:9.8p1-8 | openssh_1:9.8p1-8_all.deb |
Debian | 13 | all | openssh | < 1:9.8p1-8 | openssh_1:9.8p1-8_all.deb |
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H
AI Score
Confidence
High
EPSS
Percentile
13.8%