Rapid7 Vulnerability & Exploit Database

Huawei EulerOS: CVE-2018-1000030: python security update

Back to Search

Huawei EulerOS: CVE-2018-1000030: python security update

Severity
3
CVSS
(AV:L/AC:M/Au:N/C:P/I:N/A:P)
Published
02/08/2018
Created
07/25/2018
Added
05/02/2018
Modified
03/09/2020

Description

Python 2.7.14 is vulnerable to a Heap-Buffer-Overflow as well as a Heap-Use-After-Free. Python versions prior to 2.7.14 may also be vulnerable and it appears that Python 2.7.17 and prior may also be vulnerable however this has not been confirmed. The vulnerability lies when multiply threads are handling large amounts of data. In both cases there is essentially a race condition that occurs. For the Heap-Buffer-Overflow, Thread 2 is creating the size for a buffer, but Thread1 is already writing to the buffer without knowing how much to write. So when a large amount of data is being processed, it is very easy to cause memory corruption using a Heap-Buffer-Overflow. As for the Use-After-Free, Thread3->Malloc->Thread1->Free's->Thread2-Re-uses-Free'd Memory. The PSRT has stated that this is not a security vulnerability due to the fact that the attacker must be able to run code, however in some situations, such as function as a service, this vulnerability can potentially be used by an attacker to violate a trust boundary, as such the DWF feels this issue deserves a CVE.

Solution(s)

  • huawei-euleros-2_0_sp1-upgrade-python
  • huawei-euleros-2_0_sp1-upgrade-python-devel
  • huawei-euleros-2_0_sp1-upgrade-python-libs

With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.

– Scott Cheney, Manager of Information Security, Sierra View Medical Center

;