SPDY: SSL/TLS CRIME attack
Published Sep 15, 2012
2.6
LOWCVSS 2.0
EPSS 2.08%
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.
Affected products
No data.
No data.
Red Hat Enterprise Linux 5
firefox
Not affected
Red Hat Enterprise Linux 6
firefox
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | firefox | Not affected | n/a |
| Red Hat Enterprise Linux 6 | firefox | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
Not vulnerable. This issue did not affect the versions of Firefox as shipped with Red Hat Enterprise Linux 5 and 6 as they did not include SPDY protocol support.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:H/Au:N/C:P/I:N/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.08% (0.02079) | 80.80th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.08% (0.02079) | 78.98th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.22% (0.00222) | 42.74th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.25% (0.00250) | 65.51th | v3 (v2023.03.01) |
| Apr 15, 2024 | 0.25% (0.00250) | 64.60th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.18% (0.00176) | 52.94th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.54% (0.01537) | 74.52th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.54% (0.01537) | 74.48th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.54% (0.01537) | 72.41th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.54% (0.01537) | 51.33th | v2 (v2022.01.01) |
References (12)
- http://arstechnica.com/security/2012/09/crime-hijacks-https-sessions/ x_refsource_MISC
- http://isecpartners.com/blog/2012/9/14/details-on-the-crime-attack.html x_refsource_MISC
- http://lists.opensuse.org/opensuse-security-announce/2012-10/msg00010.html vendor-advisoryx_refsource_SUSE
- http://threatpost.com/en_us/blogs/crime-attack-uses-compression-ratio-tls-requests-side-channel-hijack-secure-sessions-091312 x_refsource_MISC
- http://www.ekoparty.org/2012/thai-duong.php x_refsource_MISC
- http://www.iacr.org/cryptodb/data/paper.php?pubkey=3091 x_refsource_MISC
- http://www.theregister.co.uk/2012/09/14/crime_tls_attack/ x_refsource_MISC
- https://access.redhat.com/security/cve/CVE-2012-4930 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=857737 x_refsource_MISCIssue Tracking
- https://community.qualys.com/blogs/securitylabs/2012/09/14/crime-information-leakage-attack-against-ssltls x_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2012-4930
- https://www.cve.org/CVERecord?id=CVE-2012-4930
Change history (0)
No recorded changes yet.