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…
- Published
- Updated
- Reserved
- Assigned by
- redhat
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.
Timeline
ID reserved
By redhat
- 2 months later
· 2 months later
Published
- 12 years later
· 12 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Medium5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
- EPSS (exploitation in 30 days)
- 3.1% · top 12% of all CVEs (8 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.0.
Weakness
Affected products
n/a
- affected n/a
References (9)
- GLSA-201301-03 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- https://trac.torproject.org/projects/tor/ticket/6252 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://bugs.gentoo.org/show_bug.cgi?id=444804 (opens in a new tab)x_refsource_CONFIRMx_transferred
- 51329 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- https://gitweb.torproject.org/arma/tor.git/commitdiff/b9b54568c0bb64c32bd0b362954bdbc8c1234b16 (opens in a new tab)x_refsource_CONFIRMx_transferred
- [oss-security] 20121126 Re: tor DoS via SENDME cells (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- https://gitweb.torproject.org/tor.git/blob/release-0.2.3:/ReleaseNotes (opens in a new tab)x_refsource_CONFIRMx_transferred
- tor-sendme-dos(80289) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- https://bugzilla.redhat.com/show_bug.cgi?id=880310 (opens in a new tab)x_refsource_CONFIRMx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2012-5573)Record last updated .