medium
5
CWE
399
Advisory Published
CVE Published
Updated

CVE-2012-5573

First published: Mon Nov 26 2012(Updated: )

It was reported [1],[2] that Tor suffered from a denial of service vulnerability due to an error when handling SENDME cells. This could be exploited to cause excessive consumption of memory resources within an entry node. This is fixed in upstream version 0.2.3.25 (git [3]). [1] <a href="https://secunia.com/advisories/51329/">https://secunia.com/advisories/51329/</a> [2] <a href="https://trac.torproject.org/projects/tor/ticket/6252">https://trac.torproject.org/projects/tor/ticket/6252</a> [3] <a href="https://gitweb.torproject.org/arma/tor.git/commitdiff/b9b54568c0bb64c32bd0b362954bdbc8c1234b16">https://gitweb.torproject.org/arma/tor.git/commitdiff/b9b54568c0bb64c32bd0b362954bdbc8c1234b16</a>

Credit: secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
Tor Project Tor<=0.2.3.24
Tor Project Tor=0.0.2
Tor Project Tor=0.0.2-pre13
Tor Project Tor=0.0.2-pre14
Tor Project Tor=0.0.2-pre15
Tor Project Tor=0.0.2-pre16
Tor Project Tor=0.0.2-pre17
Tor Project Tor=0.0.2-pre18
Tor Project Tor=0.0.2-pre19
Tor Project Tor=0.0.2-pre20
Tor Project Tor=0.0.2-pre21
Tor Project Tor=0.0.2-pre22
Tor Project Tor=0.0.2-pre23
Tor Project Tor=0.0.2-pre24
Tor Project Tor=0.0.2-pre25
Tor Project Tor=0.0.2-pre26
Tor Project Tor=0.0.2-pre27
Tor Project Tor=0.0.3
Tor Project Tor=0.0.4
Tor Project Tor=0.0.5
Tor Project Tor=0.0.6
Tor Project Tor=0.0.6.1
Tor Project Tor=0.0.6.2
Tor Project Tor=0.0.7
Tor Project Tor=0.0.7.1
Tor Project Tor=0.0.7.2
Tor Project Tor=0.0.7.3
Tor Project Tor=0.0.8.1
Tor Project Tor=0.0.9.1
Tor Project Tor=0.0.9.2
Tor Project Tor=0.0.9.3
Tor Project Tor=0.0.9.4
Tor Project Tor=0.0.9.5
Tor Project Tor=0.0.9.6
Tor Project Tor=0.0.9.7
Tor Project Tor=0.0.9.8
Tor Project Tor=0.0.9.9
Tor Project Tor=0.0.9.10
Tor Project Tor=0.1.0.10
Tor Project Tor=0.1.0.11
Tor Project Tor=0.1.0.12
Tor Project Tor=0.1.0.13
Tor Project Tor=0.1.0.14
Tor Project Tor=0.1.0.15
Tor Project Tor=0.1.0.16
Tor Project Tor=0.1.0.17
Tor Project Tor=0.1.1.20
Tor Project Tor=0.1.1.21
Tor Project Tor=0.1.1.22
Tor Project Tor=0.1.1.23
Tor Project Tor=0.1.1.24
Tor Project Tor=0.1.1.25
Tor Project Tor=0.1.1.26
Tor Project Tor=0.1.2.13
Tor Project Tor=0.1.2.14
Tor Project Tor=0.1.2.15
Tor Project Tor=0.1.2.16
Tor Project Tor=0.1.2.17
Tor Project Tor=0.1.2.18
Tor Project Tor=0.1.2.19
Tor Project Tor=0.2.0.30
Tor Project Tor=0.2.0.31
Tor Project Tor=0.2.0.32
Tor Project Tor=0.2.0.33
Tor Project Tor=0.2.0.34
Tor Project Tor=0.2.0.35
Tor Project Tor=0.2.2.18
Tor Project Tor=0.2.2.19
Tor Project Tor=0.2.2.20
Tor Project Tor=0.2.2.21
Tor Project Tor=0.2.2.22
Tor Project Tor=0.2.2.23
Tor Project Tor=0.2.2.24
Tor Project Tor=0.2.2.25
Tor Project Tor=0.2.2.26
Tor Project Tor=0.2.2.27
Tor Project Tor=0.2.2.28
Tor Project Tor=0.2.2.29
Tor Project Tor=0.2.2.30
Tor Project Tor=0.2.2.31
Tor Project Tor=0.2.2.32
Tor Project Tor=0.2.2.33
Tor Project Tor=0.2.2.34
Tor Project Tor=0.2.2.35
Tor Project Tor=0.2.2.36
Tor Project Tor=0.2.2.37
Tor Project Tor=0.2.2.38
Tor Project Tor=0.2.3
Tor Project Tor=0.2.3.13-alpha
Tor Project Tor=0.2.3.14-alpha
Tor Project Tor=0.2.3.15-alpha
Tor Project Tor=0.2.3.16-alpha
Tor Project Tor=0.2.3.17-beta
Tor Project Tor=0.2.3.18-rc
Tor Project Tor=0.2.3.19-rc
Tor Project Tor=0.2.3.20-rc
Tor Project Tor=0.2.3.21-rc
Tor Project Tor=0.2.3.22-rc
Tor Project Tor=0.2.3.23-rc

Remedy

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

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2012-5573?

    CVE-2012-5573 has been classified as a denial of service vulnerability due to excessive memory consumption.

  • How do I fix CVE-2012-5573?

    To mitigate CVE-2012-5573, upgrade to upstream version 0.2.3.25 or later of Tor.

  • What versions are affected by CVE-2012-5573?

    CVE-2012-5573 affects various versions of Tor prior to 0.2.3.25, including several release candidates and earlier versions.

  • What type of attack can exploit CVE-2012-5573?

    CVE-2012-5573 can be exploited by sending specially crafted SENDME cells to overwhelm an entry node's memory.

  • Is there a patch available for CVE-2012-5573?

    Yes, a patch is included in the Tor release version 0.2.3.25 and later to address CVE-2012-5573.

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