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CVE-2009-1836
Mozilla Firefox before 3.0.11, Thunderbird before 2.0.0.22, and SeaMonkey before 1.1.17 use the HTTP Host header to determine the context…
- 6.8MediumCVSS base score
- 2.0%Exploitation in 30 daysEPSS · top 19% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
Mozilla Firefox before 3.0.11, Thunderbird before 2.0.0.22, and SeaMonkey before 1.1.17 use the HTTP Host header to determine the context of a document provided in a non-200 CONNECT response from a proxy server, which allows man-in-the-middle attackers to execute arbitrary web script by modifying this CONNECT response, aka an "SSL tampering" attack.
Timeline
ID reserved
By redhat
- 14 days later
· 14 days later
Published
- 15 years later
· 15 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 | Medium6.8 | AV:N/AC:M/Au:N/C:P/I:P/A:P |
- EPSS (exploitation in 30 days)
- 2.0% · top 19% of all CVEs (11 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.8.
Affected products
n/a
- affected n/a
References
References35
- ADV-2009-1572 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- SSA:2009-178-01 (opens in a new tab)vendor-advisoryx_refsource_SLACKWAREx_transferred
- DSA-1830 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- 35536 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 35602 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- oval:org.mitre.oval:def:11764 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
- FEDORA-2009-7614 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- 35326 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- http://www.mozilla.org/security/announce/2009/mfsa2009-27.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- 35440 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- FEDORA-2009-6411 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- USN-782-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- 35431 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- FEDORA-2009-7567 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- 35331 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 35468 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- http://research.microsoft.com/pubs/79323/pbp-final-with-update.pdf (opens in a new tab)x_refsource_MISCx_transferred
- 35439 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 35882 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- FEDORA-2009-6366 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- MDVSA-2009:141 (opens in a new tab)vendor-advisoryx_refsource_MANDRIVAx_transferred
- 35415 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- RHSA-2009:1095 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- 35380 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- SSA:2009-167-01 (opens in a new tab)vendor-advisoryx_refsource_SLACKWAREx_transferred
- 35561 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- https://bugzilla.redhat.com/show_bug.cgi?id=503578 (opens in a new tab)x_refsource_CONFIRMx_transferred
- 55160 (opens in a new tab)vdb-entryx_refsource_OSVDBx_transferred
- SSA:2009-176-01 (opens in a new tab)vendor-advisoryx_refsource_SLACKWAREx_transferred
- DSA-1820 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- RHSA-2009:1126 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- 264308 (opens in a new tab)vendor-advisoryx_refsource_SUNALERTx_transferred
- 1022396 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- http://research.microsoft.com/apps/pubs/default.aspx?id=79323 (opens in a new tab)x_refsource_MISCx_transferred
- https://bugzilla.mozilla.org/show_bug.cgi?id=479880 (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)
- EUVD EUVD-2009-1831 (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-2009-1836)Record last updated .