CVE-2019-20382 - Missing Release of Memory after Effective Lifetime

Severity

35%

Complexity

21%

Confidentiality

23%

QEMU 4.1.0 has a memory leak in zrle_compress_data in ui/vnc-enc-zrle.c during a VNC disconnect operation because libz is misused, resulting in a situation where memory allocated in deflateInit2 is not freed in deflateEnd.

QEMU 4.1.0 has a memory leak in zrle_compress_data in ui/vnc-enc-zrle.c during a VNC disconnect operation because libz is misused, resulting in a situation where memory allocated in deflateInit2 is not freed in deflateEnd.

CVSS 3.1 Base Score 3.5. CVSS Attack Vector: adjacent_network. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L).

CVSS 2.0 Base Score 2.7. CVSS Attack Vector: adjacent_network. CVSS Attack Complexity: low. CVSS Vector: (AV:A/AC:L/Au:S/C:N/I:N/A:P).

Demo Examples

Missing Release of Memory after Effective Lifetime

CWE-401

The following C function leaks a block of allocated memory if the call to read() does not return the expected number of bytes:


               
}

                     
return buf;
return NULL;

                           
return NULL;

Overview

First reported 4 years ago

2020-03-05 19:15:00

Last updated 4 years ago

2020-05-28 23:15:00

Affected Software

QEMU 4.1.0

4.1.0

OpenSUSE Leap 15.1

15.1

References

openSUSE-SU-2020:0468

Third Party Advisory

http://www.openwall.com/lists/oss-security/2020/03/05/1

Mailing List, Patch, Third Party Advisory

https://git.qemu.org/?p=qemu.git;a=commit;h=6bf21f3d83e95bcc4ba35a7a07cc6655e8b010b0

Patch, Third Party Advisory

DSA-4665

USN-4372-1

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