CVE-2020-27617 - Reachable Assertion

Severity

65%

Complexity

27%

Confidentiality

60%

eth_get_gso_type in net/eth.c in QEMU 4.2.1 allows guest OS users to trigger an assertion failure. A guest can crash the QEMU process via packet data that lacks a valid Layer 3 protocol.

CVSS 3.1 Base Score 6.5. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).

CVSS 2.0 Base Score 4. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (AV:N/AC:L/Au:S/C:N/I:N/A:P).

Demo Examples

Reachable Assertion

CWE-617

In the excerpt below, an AssertionError (an unchecked exception) is thrown if the user hasn't entered an email address in an HTML form.


               
assert email != null;

Overview

First reported 4 years ago

2020-11-06 08:15:00

Last updated 4 years ago

2020-12-02 12:15:00

Affected Software

QEMU 4.2.1

4.2.1

References

http://www.openwall.com/lists/oss-security/2020/11/02/1

https://lists.nongnu.org/archive/html/qemu-devel/2020-10/msg05731.html

http://www.openwall.com/lists/oss-security/2020/11/02/1

Mailing List, Patch, Third Party Advisory

https://lists.nongnu.org/archive/html/qemu-devel/2020-10/msg05731.html

Mailing List, Patch, Third Party Advisory

[debian-lts-announce] 20201129 [SECURITY] [DLA 2469-1] qemu security update

https://security.netapp.com/advisory/ntap-20201202-0002/

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