What it is about

GitHub ist ein netzbasierter Dienst zur Versionsverwaltung für Software-Entwicklungsprojekte. Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in Microsoft GitHub Enterprise ausnutzen, um Dateien zu manipulieren und um beliebigen Code auszuführen.

Under what conditions?

Over the network, but only with valid access (login required), for example with stolen credentials or as an insider.

What can happen in the worst case

An attacker could use the vulnerability to

• Dateien zu manipulieren
• beliebigen Code auszuführen

Am I affected?

Affected according to the BSI:

• Microsoft GitHub Enterprise Server <3.14.24
• Microsoft GitHub Enterprise Server <3.15.19
• Microsoft GitHub Enterprise Server <3.16.15
• Microsoft GitHub Enterprise Server <3.17.12
• Microsoft GitHub Enterprise Server <3.18.6
• Microsoft GitHub Enterprise Server <3.19.3

The installed version is usually shown under “Help → About” or in the device’s admin interface.

What helps?

Update to at least:

• Microsoft GitHub Enterprise Server 3.14.24
• Microsoft GitHub Enterprise Server 3.15.19
• Microsoft GitHub Enterprise Server 3.16.15
• Microsoft GitHub Enterprise Server 3.17.12
• Microsoft GitHub Enterprise Server 3.18.6
• Microsoft GitHub Enterprise Server 3.19.3

Is the vulnerability already being exploited?

None of the CVEs is in the CISA catalogue of exploited vulnerabilities. That does not mean there are no attacks, only that none are documented.