certfr_avis - certa-2012-avi-299

CERTA-2012-AVI-299

Vulnerability from certfr_avis - Published: - Updated:

Une vulnérabilité a été corrigée dans PyCrypto. Une erreur dans la génération des clés ElGamal permet à un attaquant de reduire grandement l'espace de clés dans le cas d'une attaque par recherche exhaustive.

Solution

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation). La version 2.6 de PyCrypto corrige le problème. Les clés ElGamal générées avec une version antérieure devront être regénérées.

PyCrypto versions 2.5 et antérieures.

Impacted products

	Vendor	Product	Description

References

Title

Publication Time

CVE-2012-2417 (GCVE-0-2012-2417)

Vulnerability from cvelistv5 – Published: 2012-06-17 01:00 – Updated: 2024-08-06 19:34

Summary

PyCrypto before 2.6 does not produce appropriate prime numbers when using an ElGamal scheme to generate a key, which reduces the signature space or public key space and makes it easier for attackers to conduct brute force attacks to obtain the private key.

Severity ?

No CVSS data available.

CWE

Assigner

mitre

References

URL

Tags

	http://www.debian.org/security/2012/dsa-2502	vendor-advisoryx_refsource_DEBIAN
	http://www.osvdb.org/82279	vdb-entryx_refsource_OSVDB
	http://lists.fedoraproject.org/pipermail/package-…	vendor-advisoryx_refsource_FEDORA
	https://github.com/Legrandin/pycrypto/commit/9f91…	x_refsource_MISC
	http://www.mandriva.com/security/advisories?name=…	vendor-advisoryx_refsource_MANDRIVA
	http://www.securityfocus.com/bid/53687	vdb-entryx_refsource_BID
	https://bugs.launchpad.net/pycrypto/+bug/985164	x_refsource_MISC
	http://lists.fedoraproject.org/pipermail/package-…	vendor-advisoryx_refsource_FEDORA
	http://secunia.com/advisories/49263	third-party-advisoryx_refsource_SECUNIA
	http://lists.fedoraproject.org/pipermail/package-…	vendor-advisoryx_refsource_FEDORA
	http://www.openwall.com/lists/oss-security/2012/05/25/1	mailing-listx_refsource_MLIST
	https://hermes.opensuse.org/messages/15083589	vendor-advisoryx_refsource_SUSE
	https://exchange.xforce.ibmcloud.com/vulnerabilit…	vdb-entryx_refsource_XF
	https://github.com/dlitz/pycrypto/blob/373ea760f2…	x_refsource_CONFIRM

Show details on NVD website

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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

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