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Gentoo Linux Security Advisory GLSA 200404-03 |
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http://security.gentoo.org |
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Severity: High |
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Title: Tcpdump Vulnerabilities in ISAKMP Parsing |
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Date: March 31, 2004 |
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Bugs: #38206, #46258 |
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ID: 200404-03 |
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Synopsis |
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======== |
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|
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There are multiple vulnerabilities in tcpdump and libpcap related to |
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parsing of ISAKMP packets. |
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|
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Background |
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========== |
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|
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Tcpdump is a program for monitoring IP network traffic. Libpcap is a |
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supporting library which is responsibile for capturing packets off a |
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network interface. |
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|
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Affected packages |
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================= |
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|
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------------------------------------------------------------------- |
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Package / Vulnerable / Unaffected |
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------------------------------------------------------------------- |
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net-analyzer/tcpdump <= 3.8.1 >= 3.8.3-r1 |
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net-libs/libpcap <= 0.8.1-r1 >= 0.8.3-r1 |
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|
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Description |
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=========== |
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|
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There are two specific vulnerabilities in tcpdump, outlined in [ |
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reference 1 ]. In the first scenario, an attacker may send a |
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specially-crafted ISAKMP Delete packet which causes tcpdump to read |
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past the end of its buffer. In the second scenario, an attacker may |
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send an ISAKMP packet with the wrong payload length, again causing |
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tcpdump to read past the end of a buffer. |
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|
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Impact |
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====== |
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|
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Remote attackers could potentially cause tcpdump to crash or execute |
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arbitrary code as the 'pcap' user. |
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|
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Workaround |
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========== |
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|
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There is no known workaround at this time. All tcpdump users are |
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encouraged to upgrade to the latest available version. |
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Resolution |
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========== |
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All tcpdump users should upgrade to the latest available version. |
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ADDITIONALLY, the net-libs/libpcap package should be upgraded. |
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# emerge sync |
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# emerge -pv ">=net-libs/libpcap-0.8.3-r1" |
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">=net-analyzer/tcpdump-3.8.3-r1" |
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# emerge ">=net-libs/libpcap-0.8.3-r1" ">=net-analyzer/tcpdump-3.8.3-r1" |
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|
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References |
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========== |
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|
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[ 1 ] http://www.rapid7.com/advisories/R7-0017.html |
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[ 2 ] http://rhn.redhat.com/errata/RHSA-2004-008.html |
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[ 3 ] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0989 |
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Concerns? |
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========= |
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Security is a primary focus of Gentoo Linux and ensuring the |
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confidentiality and security of our users machines is of utmost |
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importance to us. Any security concerns should be addressed to |
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security@g.o or alternatively, you may file a bug at |
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http://bugs.gentoo.org. |
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