CVE-2012-4930
The SPDY protocol 3 and earlier, as used in Mozilla Firefox, Google Chrome, and other products,...
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.
Exploit likelihood
What each source reports
NVD Score used
2.6
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.
- Record
CVE-2012-4930- CVSS 2.0
- 2.6 Low
AV:N/AC:H/Au:N/C:P/I:N/A:N - Weakness
- CWE-310
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2012-4930- Updated
- 2026-11-02
EUVDEUVD-2012-4855 No score
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.
- Record
EUVD-2012-4855- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-g4fh-wrxx-g83w No score
The SPDY protocol 3 and earlier, as used in Mozilla Firefox, Google Chrome, and other products,...
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.
- Record
GHSA-g4fh-wrxx-g83w- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2012-4930 is a low vulnerability (CVSS 2.6) in Google Chrome, published September 15, 2012. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.08%, the 81st percentile. No source names a fixed version.
References
iacr.org/cryptodb/data/paper.php?pubkey=3091
threatpost.com/en_us/blogs/crime-attack-uses-compression-ratio-tls-requests-side-channel-hijack-secure-sessions-091312
isecpartners.com/blog/2012/9/14/details-on-the-crime-attack.html
community.qualys.com/blogs/securitylabs/2012/09/14/crime-information-leakage-attack-against-ssltls
theregister.co.uk/2012/09/14/crime_tls_attack
bugzilla.redhat.com/show_bug.cgi?id=857737