CVE-2019-5882 - Use After Free

Severity

75%

Complexity

99%

Confidentiality

106%

Irssi 1.1.x before 1.1.2 has a use after free when hidden lines are expired from the scroll buffer.

Irssi 1.1.x before 1.1.2 has a use after free when hidden lines are expired from the scroll buffer.

CVSS 3.0 Base Score 9.8. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

CVSS 2.0 Base Score 7.5. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (AV:N/AC:L/Au:N/C:P/I:P/A:P).

Demo Examples

Use After Free

CWE-416

The following example demonstrates the weakness.


               
}
free(buf3R2);

Use After Free

CWE-416

The following code illustrates a use after free error:


               
}
free(ptr);
logError("operation aborted before commit", ptr);

When an error occurs, the pointer is immediately freed. However, this pointer is later incorrectly used in the logError function.

Overview

Type

Canonical Ubuntu Linux

First reported 6 years ago

2019-01-09 23:29:00

Last updated 5 years ago

2019-02-26 17:20:00

Affected Software

Canonical Ubuntu Linux 14.04 LTS (Long-Term Support)

14.04

Canonical Ubuntu Linux 16.04 LTS (Long-Term Support)

16.04

Canonical Ubuntu Linux 18.04 LTS Edition

18.04

Canonical Ubuntu Linux 18.10

18.10

References

https://github.com/irssi/irssi/pull/948

Patch, Third Party Advisory

https://irssi.org/NEWS/#v1-1-2

Vendor Advisory

https://irssi.org/security/irssi_sa_2019_01.txt

Vendor Advisory

USN-3862-1

Third Party Advisory

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