CVE-2012-5573

Severity

50%

Complexity

99%

Confidentiality

48%

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.

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.

CVSS 2.0 Base Score 5. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (AV:N/AC:L/Au:N/C:N/I:N/A:P).

Overview

Type

Torproject Tor

First reported 12 years ago

2013-01-01 12:35:00

Last updated 7 years ago

2017-08-29 01:32:00

Affected Software

Torproject Tor 0.0.2

0.0.2

Torproject Tor 0.0.2pre13

0.0.2

Torproject Tor 0.0.2pre14

0.0.2

Torproject Tor 0.0.2pre15

0.0.2

Torproject Tor 0.0.2pre16

0.0.2

Torproject Tor 0.0.2pre17

0.0.2

Torproject Tor 0.0.2pre18

0.0.2

Torproject Tor 0.0.2pre19

0.0.2

Torproject Tor 0.0.2pre20

0.0.2

Torproject Tor 0.0.2pre21

0.0.2

Torproject Tor 0.0.2pre22

0.0.2

Torproject Tor 0.0.2pre23

0.0.2

Torproject Tor 0.0.2pre24

0.0.2

Torproject Tor 0.0.2pre25

0.0.2

Torproject Tor 0.0.2pre26

0.0.2

Torproject Tor 0.0.2pre27

0.0.2

Torproject Tor 0.0.3

0.0.3

Torproject Tor 0.0.4

0.0.4

Torproject Tor 0.0.5

0.0.5

Torproject Tor 0.0.6

0.0.6

Torproject Tor 0.0.6.1

0.0.6.1

Torproject Tor 0.0.6.2

0.0.6.2

Torproject Tor 0.0.7

0.0.7

Torproject Tor 0.0.7.1

0.0.7.1

Torproject Tor 0.0.7.2

0.0.7.2

Torproject Tor 0.0.7.3

0.0.7.3

Torproject Tor 0.0.8.1

0.0.8.1

Torproject Tor 0.0.9.1

0.0.9.1

Torproject Tor 0.0.9.2

0.0.9.2

Torproject Tor 0.0.9.3

0.0.9.3

Torproject Tor 0.0.9.4

0.0.9.4

Torproject Tor 0.0.9.5

0.0.9.5

Torproject Tor 0.0.9.6

0.0.9.6

Torproject Tor 0.0.9.7

0.0.9.7

Torproject Tor 0.0.9.8

0.0.9.8

Torproject Tor 0.0.9.9

0.0.9.9

Torproject Tor 0.0.9.10

0.0.9.10

Torproject Tor 0.1.0.10

0.1.0.10

Torproject Tor 0.1.0.11

0.1.0.11

Torproject Tor 0.1.0.12

0.1.0.12

Torproject Tor 0.1.0.13

0.1.0.13

Torproject Tor 0.1.0.14

0.1.0.14

Torproject Tor 0.1.0.15

0.1.0.15

Torproject Tor 0.1.0.16

0.1.0.16

Torproject Tor 0.1.0.17

0.1.0.17

Torproject Tor 0.1.1.20

0.1.1.20

Torproject Tor 0.1.1.21

0.1.1.21

Torproject Tor 0.1.1.22

0.1.1.22

Torproject Tor 0.1.1.23

0.1.1.23

Torproject Tor 0.1.1.24

0.1.1.24

Torproject Tor 0.1.1.25

0.1.1.25

Torproject Tor 0.1.1.26

0.1.1.26

Torproject Tor 0.1.2.13

0.1.2.13

Torproject Tor 0.1.2.14

0.1.2.14

Torproject Tor 0.1.2.15

0.1.2.15

Torproject Tor 0.1.2.16

0.1.2.16

Torproject Tor 0.1.2.17

0.1.2.17

Torproject Tor 0.1.2.18

0.1.2.18

Torproject Tor 0.1.2.19

0.1.2.19

Torproject Tor 0.2.0.30

0.2.0.30

Torproject Tor 0.2.0.31

0.2.0.31

Torproject Tor 0.2.0.32

0.2.0.32

Torproject Tor 0.2.0.33

0.2.0.33

Torproject Tor 0.2.0.34

0.2.0.34

Torproject Tor 0.2.0.35

0.2.0.35

Torproject Tor 0.2.2.18

0.2.2.18

Torproject Tor 0.2.2.19

0.2.2.19

Torproject Tor 0.2.2.20

0.2.2.20

Torproject Tor 0.2.2.21

0.2.2.21

Torproject Tor 0.2.2.22

0.2.2.22

Torproject Tor 0.2.2.23

0.2.2.23

Torproject Tor 0.2.2.24

0.2.2.24

Torproject Tor 0.2.2.25

0.2.2.25

Torproject Tor 0.2.2.26

0.2.2.26

Torproject Tor 0.2.2.27

0.2.2.27

Torproject Tor 0.2.2.28

0.2.2.28

Torproject Tor 0.2.2.29

0.2.2.29

Torproject Tor 0.2.2.30

0.2.2.30

Torproject Tor 0.2.2.31

0.2.2.31

Torproject Tor 0.2.2.32

0.2.2.32

Torproject Tor 0.2.2.33

0.2.2.33

Torproject Tor 0.2.2.34

0.2.2.34

Torproject Tor 0.2.2.35

0.2.2.35

Torproject Tor 0.2.2.36

0.2.2.36

Torproject Tor 0.2.2.37

0.2.2.37

Torproject Tor 0.2.2.38

0.2.2.38

Torproject Tor 0.2.3

0.2.3

Torproject Tor 0.2.3.13 Alpha

0.2.3.13

Torproject Tor 0.2.3.14 Alpha

0.2.3.14

Torproject Tor 0.2.3.15 Alpha

0.2.3.15

Torproject Tor 0.2.3.16 Alpha

0.2.3.16

Torproject Tor 0.2.3.17 Beta

0.2.3.17

Torproject Tor 0.2.3.18 Release Candidate

0.2.3.18

Torproject Tor 0.2.3.19 Release Candidate

0.2.3.19

Torproject Tor 0.2.3.20 Release Candidate

0.2.3.20

Torproject Tor 0.2.3.21 Release Candidate

0.2.3.21

Torproject Tor 0.2.3.22 Release Candidate

0.2.3.22

Torproject Tor 0.2.3.23 Release Candidate

0.2.3.23

References

[oss-security] 20121126 Re: tor DoS via SENDME cells

51329

GLSA-201301-03

https://bugs.gentoo.org/show_bug.cgi?id=444804

https://bugzilla.redhat.com/show_bug.cgi?id=880310

tor-sendme-dos(80289)

https://gitweb.torproject.org/arma/tor.git/commitdiff/b9b54568c0bb64c32bd0b362954bdbc8c1234b16

Patch

https://gitweb.torproject.org/tor.git/blob/release-0.2.3:/ReleaseNotes

https://trac.torproject.org/projects/tor/ticket/6252

Vendor Advisory

Stay updated

ExploitPedia is constantly evolving. Sign up to receive a notification when we release additional functionality.

Get in touch

If you'd like to report a bug or have any suggestions for improvements then please do get in touch with us using this form. We will get back to you as soon as we can.