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Tor: Mehrere Schwachstellen
Advisory ansehen veröffentlicht 2026-08-20
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Tor ausnutzen, um Sicherheitsmaßnahmen zu umgehen, Daten zu manipulieren, Informationen offenzulegen oder einen Denial-of-Service-Zustand herbeizuführen.
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beschreibt (7)
Zugehörige CVEs.
| ID | Schweregrad | ausnutzbar | ||
|---|---|---|---|---|
| CVE-2026-77642US | critical9.3 | — | ||
tor before 0.4.9.9 was prone to an out-of-bounds write when parsing a consensus or detached signature with unexpected signature digest type. Impact is minor for most Tor roles, b… | ||||
| CVE-2026-77641US | high8.2 | — | ||
tor before 0.4.9.9 was prone to a NULL write after free when sending a CONFLUX_SWITCH cell fails. The return value of relay_send_command_from_edge() was ignored, so a send failur… | ||||
| CVE-2026-77640US | medium5.3 | — | ||
tor before 0.4.9.9 was prone to an infinite loop when decompressing a truncated zlib/gzip stream with done=1. A truncated stream never reaches Z_STREAM_END, causing zlib to retur… | ||||
| CVE-2026-77639US | — | — | ||
Tor before 0.4.9.9 was prone to a compression bomb bypass where an attacker could concatenate many gzip or zlib sub-streams, each just under the per-stream detection threshold, to… | ||||
| CVE-2026-77638US | critical9.0 | — | ||
Tor before 0.4.9.11 is prone to a race condition where in just the right circumstances a rendezvous point could man-in-the-middle (impersonate) the onion service that the client wa… | ||||
| CVE-2026-77587US | high7.5 | — | ||
Tor before 0.4.9.11 is prone to a use-after-free (and potential double free) of a conflux object when a recovery leg revives a conflux set whose last linked leg has already been cl… | ||||
| CVE-2026-77584US | high8.2 | — | ||
Tor before 0.4.9.10 did not reject a CONFLUX_LINK cell that arrives on a circuit which already has attached streams. A malicious client could send a RELAY_COMMAND_BEGIN before the… | ||||
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Referenzen
Externe Belege — Patches, Meldungen, Analysen.
- GitHub Security Advisory GHSA-36CC-RHPV-JRXC vom 2026-08-20external
- GitHub Security Advisory GHSA-5g6h-2vr8-m7f4 vom 2026-08-20external
- GitHub Security Advisory GHSA-9mf5-x83c-fg2x vom 2026-08-20external
- GitHub Security Advisory GHSA-J5C4-CWJR-6VV5 vom 2026-08-20external
- GitHub Security Advisory GHSA-PQ38-GW56-4W65 vom 2026-08-20external
- GitHub Security Advisory GHSA-jm5p-g55h-rwhg vom 2026-08-20external
- GitHub Security Advisory GHSA-r3c6-fj5w-6f75 vom 2026-08-20external
- Tor Changelog vom 2026-08-20external
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