CVE-2017-7749 - Use After Free

Severity

75%

Complexity

99%

Confidentiality

106%

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

First reported 6 years ago

2018-06-11 21:29:00

Last updated 6 years ago

2018-08-03 14:18:00

Affected Software

Debian Linux 8.0 (Jessie)

8.0

Debian Linux 9.0

9.0

Red Hat Enterprise Linux 6.0

6.0

Red Hat Enterprise Linux (RHEL) 7.0 (7)

7.0

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 Advanced mission critical Update Support (AUS) 7.3

7.3

Red Hat Enterprise Linux Server Advanced mission critical Update Support (AUS) 7.4

7.4

Red Hat Enterprise Linux Server Extended Update Support (EUS) 7.3

7.3

Red Hat Enterprise Linux Server Extended Update Support (EUS) 7.4

7.4

Red Hat Enterprise Linux Server Extended Update Support (EUS) 7.5

7.5

Red Hat Enterprise Linux Workstation 6.0

6.0

RedHat Enterprise Linux Workstation 7.0

7.0

Mozilla Firefox

Mozilla Thunderbird

References

99057

Third Party Advisory, VDB Entry

1038689

Third Party Advisory, VDB Entry

RHSA-2017:1440

Third Party Advisory

RHSA-2017:1561

Third Party Advisory

https://bugzilla.mozilla.org/show_bug.cgi?id=1355039

Issue Tracking, Patch, Vendor Advisory

DSA-3881

Third Party Advisory

DSA-3918

Third Party Advisory

https://www.mozilla.org/security/advisories/mfsa2017-15/

Vendor Advisory

https://www.mozilla.org/security/advisories/mfsa2017-16/

Vendor Advisory

https://www.mozilla.org/security/advisories/mfsa2017-17/

Vendor Advisory

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