CVE-2016-5824 - Use After Free

Severity

43%

Complexity

86%

Confidentiality

48%

libical 1.0 allows remote attackers to cause a denial of service (use-after-free) via a crafted ics file.

libical 1.0 allows remote attackers to cause a denial of service (use-after-free) via a crafted ics file.

CVSS 3.0 Base Score 5.5. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H).

CVSS 2.0 Base Score 4.3. CVSS Attack Vector: network. CVSS Attack Complexity: medium. CVSS Vector: (AV:N/AC:M/Au:N/C:N/I:N/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

First reported 8 years ago

2017-01-27 22:59:00

Last updated 5 years ago

2019-04-02 07:29:00

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

Red Hat Enterprise Linux Desktop 6.0

6.0

RedHat Enterprise Linux Desktop 7.0

7.0

Red Hat Enterprise Linux Server 6.0

6.0

RedHat Enterprise Linux Server 7.0

7.0

Red Hat Enterprise Linux Server Advanced mission critical Update Support (AUS) 7.6

7.6

Red Hat Enterprise Linux Server Extended Update Support (EUS) 7.6

7.6

Red Hat Enterprise Linux Server Telecommunications Update Service (TUS) 7.6

7.6

Red Hat Enterprise Linux Workstation 6.0

6.0

RedHat Enterprise Linux Workstation 7.0

7.0

References

[oss-security] 20160625 Re: libical 0.47 SEGV on unknown address

Mailing List, Third Party Advisory

[oss-security] 20170120 Re: CVE-2016-9584: heap use-after-free on libical

Mailing List, Patch, Third Party Advisory

91459

Third Party Advisory, VDB Entry

RHSA-2019:0269

Third Party Advisory

RHSA-2019:0270

Third Party Advisory

https://bugzilla.mozilla.org/show_bug.cgi?id=1275400

Issue Tracking

https://github.com/libical/libical/issues/235

Issue Tracking, Patch, Third Party Advisory

https://github.com/libical/libical/issues/251

Issue Tracking, Patch, Third Party Advisory

https://github.com/libical/libical/issues/286

Issue Tracking, Patch, Third Party Advisory

GLSA-201904-02

GLSA-201904-07

USN-3897-1

Third Party Advisory

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