CVE-2017-2625 Weak cryptography in libXdmcp
Weak entropy in libXdmcp allows local attackers to brute force session keys and hijack other users' sessions on multi-user systems using xdmcp.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2017-2625?
CVE-2017-2625 is a medium-severity vulnerability in Redhat Enterprise Linux, published on 27 Jul 2018. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
It was discovered that libXdmcp before 1.1.2 including used weak entropy to generate session keys. On a multi-user system using xdmcp, a local attacker could potentially use information available from the process list to brute force the key, allowing them to hijack other users' sessions.
Which versions are affected by CVE-2017-2625?
It affects 7 products.
Linux distribution packages (13)
libXdmcp SUSE:Linux Enterprise Desktop 12 SP2 | All versions | 1.1.1-10.1 |
libXdmcp SUSE:Linux Enterprise Desktop 12 SP3 | All versions | 1.1.1-12.1 |
xorg-x11-libXdmcp SUSE:Linux Enterprise Server 11 SP4 | All versions | 7.4-3.1 |
libXdmcp SUSE:Linux Enterprise Server 12 SP2 | All versions | 1.1.1-10.1 |
libXdmcp SUSE:Linux Enterprise Server 12 SP3 | All versions | 1.1.1-12.1 |
libXdmcp SUSE:Linux Enterprise Server for Raspberry Pi 12 SP2 | All versions | 1.1.1-10.1 |
xorg-x11-libXdmcp SUSE:Linux Enterprise Server for SAP Applications 11 SP4 | All versions | 7.4-3.1 |
libXdmcp SUSE:Linux Enterprise Server for SAP Applications 12 SP2 | All versions | 1.1.1-10.1 |
libXdmcp SUSE:Linux Enterprise Server for SAP Applications 12 SP3 | All versions | 1.1.1-12.1 |
xorg-x11-libXdmcp SUSE:Linux Enterprise Software Development Kit 11 SP4 | All versions | 7.4-3.1 |
libXdmcp SUSE:Linux Enterprise Software Development Kit 12 SP2 | All versions | 1.1.1-10.1 |
libXdmcp SUSE:Linux Enterprise Software Development Kit 12 SP3 | All versions | 1.1.1-12.1 |
libXdmcp openSUSE:Tumbleweed | All versions | 1.1.3-1.11 |
Products include Redhat Enterprise Linux, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server, Redhat Enterprise Linux Server Aus, Redhat Enterprise Linux Server Eus, Redhat Enterprise Linux Workstation and 1 more.
How do I fix CVE-2017-2625?
Upgrade to a fixed version.
Is CVE-2017-2625 being exploited?
There is no known exploitation of CVE-2017-2625 in the wild and no public exploit code.
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- CVE-2018-25011 Memory corruption in libwebp
- CVE-2018-25014 Other in libwebp
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Sources
Also known as ALPINE-CVE-2017-2625, DEBIAN-CVE-2017-2625, GHSA-cvmx-9h9q-8hmw, MGASA-2017-0330, SUSE-SU-2017:1862-1, SUSE-SU-2017:1868-1 and 4 more.