VulnerabilityModified

CVE-2018-1000807

HIGH 8.1EPSS 4.08%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (4.08%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

Python Cryptographic Authority pyopenssl version prior to version 17.5.0 contains a CWE-416: Use After Free vulnerability in X509 object handling that can result in Use after free can lead to possible denial of service or remote code execution.. This attack appear to be exploitable via Depends on the calling application and if it retains a reference to the memory.. This vulnerability appears to have been fixed in 17.5.0.

CVSS 3.1: 8.1 HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 4.08% probability · 90th percentile
CISA KEV: Not listed
Weakness: CWE-416
Affected: pyopenssl/pyopenssl · canonical/ubuntu linux · redhat/openstack · redhat/enterprise linux desktop · redhat/enterprise linux server · redhat/enterprise linux workstation
Source: cve@mitre.org

References

http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00014.htmlMailing List, Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:0085Third Party Advisory
https://github.com/pyca/pyopenssl/commit/e73818600065821d588af475b024f4eb518c3509
https://github.com/pyca/pyopenssl/pull/723Patch, Third Party Advisory
https://usn.ubuntu.com/3813-1/Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00014.htmlMailing List, Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:0085Third Party Advisory
https://github.com/pyca/pyopenssl/commit/e73818600065821d588af475b024f4eb518c3509
https://github.com/pyca/pyopenssl/pull/723Patch, Third Party Advisory
https://usn.ubuntu.com/3813-1/Third Party Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.