certfr_avis - CERTA-2011-AVI-615

CERTA-2011-AVI-615

Vulnerability from certfr_avis - Published: - Updated:

Une vulnérabilité dans le proxy Squid permet de mener une attaque par déni de service à distance.

Description

Une erreur de segmentation a lieu lors d'une libération mémoire lorsque Squid tente de résoudre une requête DNS où un enregistrement de type CNAME pointe sur un autre enregistrement de type CNAME qui pointe sur un enregistrement de type A vide. Une personne malintentionnée peut envoyer une requête spécifique à un proxy Squid, provoquant cette erreur pour mener une attaque par déni de service à distance.

Solution

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

Squid version 3.1 non patchée.

Impacted products

	Vendor	Product	Description

References

Title

Publication Time

CVE-2011-4096 (GCVE-0-2011-4096)

Vulnerability from cvelistv5 – Published: 2011-11-17 19:00 – Updated: 2024-08-06 23:53

Summary

The idnsGrokReply function in Squid before 3.1.16 does not properly free memory, which allows remote attackers to cause a denial of service (daemon abort) via a DNS reply containing a CNAME record that references another CNAME record that contains an empty A record.

Severity ?

No CVSS data available.

CWE

Assigner

redhat

References

URL

Tags

	http://bugs.squid-cache.org/show_bug.cgi?id=3237#c12	x_refsource_MISC
	http://www.redhat.com/support/errata/RHSA-2011-17…	vendor-advisoryx_refsource_REDHAT
	http://lists.opensuse.org/opensuse-security-annou…	vendor-advisoryx_refsource_SUSE
	http://www.openwall.com/lists/oss-security/2011/10/31/5	mailing-listx_refsource_MLIST
	http://www.securitytracker.com/id?1026265	vdb-entryx_refsource_SECTRACK
	http://www.openwall.com/lists/oss-security/2011/11/01/3	mailing-listx_refsource_MLIST
	http://www.mandriva.com/security/advisories?name=…	vendor-advisoryx_refsource_MANDRIVA
	http://secunia.com/advisories/46609	third-party-advisoryx_refsource_SECUNIA
	http://www.squid-cache.org/Versions/v3/3.1/change…	x_refsource_CONFIRM
	http://lists.opensuse.org/opensuse-security-annou…	vendor-advisoryx_refsource_SUSE
	http://secunia.com/advisories/47459	third-party-advisoryx_refsource_SECUNIA

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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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