The Patching Friars' AlmanacA calendar of CVE saints

Patron of September 20

PoodleBleedHoly card for poodlebleed, generated with AI (Claude, Anthropic) for the Lunario dei Frati Patchatori.CC BY-NC-SA 4.0 SSLv3 PoodleBleed VETUS SSL REDIT
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Saint PoodleBleed, Who Brought SSL 3.0 Back

Patron of old SSL versions, protocol downgrades, and badly groomed poodles.

Life

On 20 September 2014 Bodo Möller, Thai Duong and Krzysztof Kotowicz of Google revealed POODLE, an attack on venerable SSL 3.0. By forcing a connection to downgrade to that protocol and exploiting CBC padding, an attacker could decrypt sensitive data such as session cookies one byte at a time. A variant also hit some TLS implementations that reused the old code.

Prayer

O Saint PoodleBleed, who bring back to life the protocols we thought buried, let our servers refuse SSL 3.0 for ever. Amen.

How to celebrate

Celebrated by disabling SSL 3.0 everywhere and enabling TLS_FALLBACK_SCSV against downgrades.

An old protocol never buried will bite again sooner or later.

Technical record

Disclosed on
September 20 2014
CVE
CVE-2014-8730

The SSL profiles component in F5 BIG-IP LTM, APM, and ASM 10.0.0 through 10.2.4 and 11.0.0 through 11.5.1, AAM 11.4.0 through 11.5.1, AFM 11.3.0 through 11.5.1, Analytics 11.0.0 through 11.5.1, Edge Gateway, WebAccelerator, and WOM 10.1.0 through 10.2.4 and 11.0.0 through 11.3.0, PEM 11.3.0 through 11.6.0, and PSM 10.0.0 through 10.2.4 and 11.0.0 through 11.4.1 and BIG-IQ Cloud and Security 4.0.0 through 4.4.0 and Device 4.2.0 through 4.4.0, when using TLS 1.x before TLS 1.2, does not properly check CBC padding bytes when terminating connections, which makes it easier for man-in-the-middle attackers to obtain cleartext data via a padding-oracle attack, a variant of CVE-2014-3566 (aka POODLE). NOTE: the scope of this identifier is limited to the F5 implementation only. Other vulnerable implementations should receive their own CVE ID, since this is not a vulnerability within the design of TLS 1.x itself.

Sources: poodlebleed.com · openssl-library.org

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