Unscored severity · published Jan 1, 2013
CVE-2012-5573
The connection_edge_process_relay_cell function in or/relay.c in Tor before 0.2.3.25 maintains circuits even if an unexpected SENDME cell arrives, which might allow remote…
–
CVSS
3.1%
EPSS
No
On KEV
Description
The connection_edge_process_relay_cell function in or/relay.c in Tor before 0.2.3.25 maintains circuits even if an unexpected SENDME cell arrives, which might allow remote attackers to cause a denial of service (memory consumption or excessive cell reception rate) or bypass intended flow-control restrictions via a RELAY_COMMAND_SENDME command.
Exploitation
Is it being used?
Exploit prediction (EPSS)3.1% · higher than 88% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TO
Tor · Torproject
through 0.2.3.24; 0.0.2; 0.0.2; 0.0.2; 0.0.2; 0.0.2; +34 more · source: NVD
Affected product
TO
Tor
Torproject
More from Tor
7.5
CVE-2016-9079
Mozilla Firefox, Firefox ESR, and Thunderbird Use-After-Free Vulnerability
9.3
CVE-2026-77642
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
9.1
CVE-2026-44603
Tor before 0.4.9.7 has an out-of-bounds read by one byte via a malformed BEGIN cell, aka TROVE-2026-007
9.1
CVE-2026-44597
Tor before 0.4.9.7 has an out-of-bounds read when an END, a TRUNCATE, or a TRUNCATED cell lacks a reason in its payload, aka TROVE-2026-011
9.0
CVE-2026-77638
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…