CVE-2015-5352
The x11_open_helper function in channels.c in ssh in OpenSSH before 6.9, when ForwardX11Trusted mode is not used, lacks a check of the refusal deadline for X connections, which makes it easier for remote attackers to bypass intended access restrictions…
Does this matter?
Lower severity and a low EPSS score (5.45%). Track it; it rarely justifies an emergency change on its own.
Description
The x11_open_helper function in channels.c in ssh in OpenSSH before 6.9, when ForwardX11Trusted mode is not used, lacks a check of the refusal deadline for X connections, which makes it easier for remote attackers to bypass intended access restrictions via a connection outside of the permitted time window.
- CVSS 2.0
- 4.3 MEDIUMAV:N/AC:M/Au:N/C:N/I:P/A:N
- EPSS
- 5.45% probability · 92th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-264
- Affected
- openbsd/openssh
- Source
- cve@mitre.org
References
- http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00017.html
- http://openwall.com/lists/oss-security/2015/07/01/10
- http://rhn.redhat.com/errata/RHSA-2016-0741.html
- http://www.openssh.com/txt/release-6.9Vendor Advisory
- http://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.html
- http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
- http://www.securityfocus.com/bid/75525
- http://www.securitytracker.com/id/1032797
- http://www.ubuntu.com/usn/USN-2710-1
- http://www.ubuntu.com/usn/USN-2710-2
- https://anongit.mindrot.org/openssh.git/commit/?h=V_6_9&id=1bf477d3cdf1a864646d59820878783d42357a1d
- https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
- https://lists.debian.org/debian-lts-announce/2018/09/msg00010.html
- https://security.gentoo.org/glsa/201512-04
- https://security.netapp.com/advisory/ntap-20181023-0001/
- http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00017.html
- http://openwall.com/lists/oss-security/2015/07/01/10
- http://rhn.redhat.com/errata/RHSA-2016-0741.html
- http://www.openssh.com/txt/release-6.9Vendor Advisory
- http://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.html
- http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
- http://www.securityfocus.com/bid/75525
- http://www.securitytracker.com/id/1032797
- http://www.ubuntu.com/usn/USN-2710-1
- http://www.ubuntu.com/usn/USN-2710-2
- https://anongit.mindrot.org/openssh.git/commit/?h=V_6_9&id=1bf477d3cdf1a864646d59820878783d42357a1d
- https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
- https://lists.debian.org/debian-lts-announce/2018/09/msg00010.html
- https://security.gentoo.org/glsa/201512-04
- https://security.netapp.com/advisory/ntap-20181023-0001/
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.