Improper authorization fallback allows scoped user-to-server token installation escape in GitHub Enterprise Server
21Vexday Risk Score
Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.
ssvc Trackcvss 7.2epss 0.2%
probabilidade de exploração
0.2%top 86% das CVEs
exploração observada
nãonenhuma fonte reporta
An improper authorization vulnerability in scoped user-to-server (ghu_) token authorization in GitHub Enterprise Server allows an authenticated attacker to access private repositories outside the intended installation scope, which can include write operations, via an authorization fallback that treated a revoked/deleted installation as a global installation context, which could be chained with token revocation timing and SSH push attribution to obtain and reuse a victim-scoped token. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.21 and was fixed in versions 3.20.1, 3.19.5, 3.18.8, 3.17.14, 3.16.17, 3.15.21, and 3.14.26. This vulnerability was reported via the GitHub Bug Bounty program.
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N
Produtos afetados
GitHub · Enterprise ServerReferências
https://docs.github.com/en/enterprise-server@3.14/admin/release-notes#3.14.26https://docs.github.com/en/enterprise-server@3.15/admin/release-notes#3.15.21https://docs.github.com/en/enterprise-server@3.16/admin/release-notes#3.16.17https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.14https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.8https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.5https://docs.github.com/en/enterprise-server@3.20/admin/release-notes#3.20.1