Buffer overflow in the process_ra function in the router advertisement daemon (radvd) before 1.8.2 allows remote attackers to execute arbitrary code or cause a denial of service (crash) via a negative value in a label_len value.

This update of radvd fixes the following security flaws :

  - arbitrary file overwrite flaw through unsanitized     interface names (CVE-2011-3602),

  - missing return value checks in privsep_init() which     could cause radvd to keep running with root privileges     (CVE-2011-3603),

  - buffer overread flaws in the process_ra() function     (CVE-2011-3604),

  - temporary denial of service flaw triggered with a flood     of ND_ROUTER_SOLICIT (CVE-2011-3605)

This update of radvd fixes the following security flaws :

  - arbitrary file overwrite flaw through unsanitized     interface names (CVE-2011-3602),

  - missing return value checks in privsep_init() which     could cause radvd to keep running with root privileges     (CVE-2011-3603),

  - buffer overread flaws in the process_ra() function     (CVE-2011-3604),

  - temporary denial of service flaw triggered by a flood of     ND_ROUTER_SOLICIT (CVE-2011-3605)

The remote host is affected by the vulnerability described in GLSA-201111-08 (radvd: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in radvd. Please review       the CVE identifiers referenced below for details.
  Impact :

    A remote unauthenticated attacker may be able to gain escalated       privileges, escalate the privileges of the radvd process, overwrite files       with specific names, or cause a Denial of Service. Local attackers may be       able to overwrite the contents of arbitrary files using symlinks.
  Workaround :

    There is no known workaround at this time.

Vasiliy Kulikov discovered that radvd incorrectly parsed the ND_OPT_DNSSL_INFORMATION option. A remote attacker could exploit this with a specially crafted request and cause the radvd daemon to crash, or possibly execute arbitrary code. The default compiler options for affected releases should reduce the vulnerability to a denial of service. This issue only affected Ubuntu 11.04 and 11.10.
(CVE-2011-3601)

Vasiliy Kulikov discovered that radvd incorrectly filtered interface names when creating certain files. A local attacker could exploit this to overwrite certain files on the system, bypassing intended permissions. (CVE-2011-3602)

Vasiliy Kulikov discovered that radvd incorrectly handled certain lengths. A remote attacker could exploit this to cause the radvd daemon to crash, resulting in a denial of service. (CVE-2011-3604)

Vasiliy Kulikov discovered that radvd incorrectly handled delays when used in unicast mode, which is not the default in Ubuntu. If used in unicast mode, a remote attacker could cause radvd outages, resulting in a denial of service. (CVE-2011-3605).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

update to latest upstream radvd-1.8.2 fixes CVE-2011-3601, CVE-2011-3602, CVE-2011-3603, CVE-2011-3604, CVE-2011-= 3605
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Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Severity
76008	openSUSE Security Update : radvd (openSUSE-SU-2011:1247-1)	Nessus	SuSE Local Security Checks	high
75724	openSUSE Security Update : radvd (openSUSE-SU-2011:1247-1)	Nessus	SuSE Local Security Checks	high
57133	SuSE 11.1 Security Update : radvd (SAT Patch Number 5397)	Nessus	SuSE Local Security Checks	high
56904	GLSA-201111-08 : radvd: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	high
56776	Ubuntu 10.04 LTS / 10.10 / 11.04 / 11.10 : radvd vulnerabilities (USN-1257-1)	Nessus	Ubuntu Local Security Checks	high
56717	Fedora 16 : radvd-1.8.2-2.fc16 (2011-13989)	Nessus	Fedora Local Security Checks	high
56656	Fedora 15 : radvd-1.8.2-2.fc15 (2011-14022)	Nessus	Fedora Local Security Checks	high
56655	Fedora 14 : radvd-1.8.2-2.fc14 (2011-14000)	Nessus	Fedora Local Security Checks	high

Detections

Analytics

CVE-2011-3601

critical

Tenable Plugins

high

high

high

high

high

high

high

high