Unrated severityNVD Advisory· Published Sep 15, 2012· Updated Jun 16, 2026
CVE-2012-4930
CVE-2012-4930
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
14cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
- (no CPE)
- osv-coords10 versionspkg:apk/chainguard/chromiumpkg:apk/chainguard/chromium-docker-selenium-compatpkg:apk/chainguard/chromium-langpkg:apk/chainguard/chromium-qtpkg:apk/chainguard/firefoxpkg:apk/wolfi/chromiumpkg:apk/wolfi/chromium-docker-selenium-compatpkg:apk/wolfi/chromium-langpkg:apk/wolfi/chromium-qtpkg:apk/wolfi/firefox
< 0+ 9 more
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
Patches
Vulnerability mechanics
References
9- arstechnica.com/security/2012/09/crime-hijacks-https-sessions/nvd
- isecpartners.com/blog/2012/9/14/details-on-the-crime-attack.htmlnvd
- lists.opensuse.org/opensuse-security-announce/2012-10/msg00010.htmlnvd
- threatpost.com/en_us/blogs/crime-attack-uses-compression-ratio-tls-requests-side-channel-hijack-secure-sessions-091312nvd
- www.ekoparty.org/2012/thai-duong.phpnvd
- www.iacr.org/cryptodb/data/paper.phpnvd
- www.theregister.co.uk/2012/09/14/crime_tls_attack/nvd
- bugzilla.redhat.com/show_bug.cginvd
- community.qualys.com/blogs/securitylabs/2012/09/14/crime-information-leakage-attack-against-ssltlsnvd
News mentions
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