The SPDY protocol 3 and earlier, as used in Mozilla Firefox, Google Chrome, and other…
Priority LOW 17CWE-310Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- High
- Impact type
- —
- Confidentiality · integrity · availability
- Partial · None · None
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
The SPDY protocol 3 and earlier, as used in Mozilla Firefox, Google Chrome, and other products, can perform TLS encryption of compressed data without properly obfuscating the length of the unencrypted data, which allows man-in-the-middle attackers to obtain plaintext HTTP headers by observing length differences during a series of guesses in which a string in an HTTP request potentially matches an unknown string in an HTTP header, aka a "CRIME" attack.
Why it matters now
EPSS 0.02079 81st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Not affected: 2 products
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 6
Timeline
- 2026-10-02 Threatist record created from CVE-2012-4930
- 2026-10-03 Alias added: GHSA-g4fh-wrxx-g83w
References
Advisory 1
Other 8
- http://www.iacr.org/cryptodb/data/paper.php?pubkey=3091
- http://threatpost.com/en_us/blogs/crime-attack-uses-compression-ratio-tls-requests-side-channel-hijack-secure-sessions-091312
- http://isecpartners.com/blog/2012/9/14/details-on-the-crime-attack.html
- https://community.qualys.com/blogs/securitylabs/2012/09/14/crime-information-leakage-attack-against-ssltls
- http://www.theregister.co.uk/2012/09/14/crime_tls_attack/
- https://bugzilla.redhat.com/show_bug.cgi?id=857737
- http://arstechnica.com/security/2012/09/crime-hijacks-https-sessions/
- http://www.ekoparty.org/2012/thai-duong.php
Sources
- CVE-2012-4930 · CVE Program
- CVE-2012-4930 · NVD
- FIRST EPSS
- GHSA-g4fh-wrxx-g83w · GitHub Advisory Database · CC BY 4.0
- CVE-2012-4930 · Red Hat security data · CC BY 4.0
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