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CVE-2005-0021

Status Candidate

Overview

Multiple buffer overflows in Exim before 4.43 may allow attackers to execute arbitrary code via (1) an IPv6 address with more than 8 components, as demonstrated using the -be command line option, which triggers an overflow in the host_aton function, or (2) the -bh command line option or dnsdb PTR lookup, which triggers an overflow in the dns_build_reverse function.

Related Files

dsa-637.txt
Posted Jan 16, 2005
Site debian.org

Debian Security Advisory 637-1 - Philip Hazel announced a buffer overflow in the host_aton function in exim-tls, the SSL-enabled version of the default mail-tranport-agent in Debian, which can lead to the execution of arbitrary code via an illegal IPv6 address.

tags | advisory, overflow, arbitrary
systems | linux, debian
advisories | CVE-2005-0021
SHA-256 | 2112b135f500dfd415c1aa19e2509da559b170355b88154dfb638bfe051ee169
IDEF0725.txt
Posted Jan 11, 2005
Site idefense.com

iDEFENSE Security Advisory IDEF0725 - Local exploitation of a buffer overflow vulnerability in Exim 4.41 may allow execution of arbitrary commands with elevated privileges. The problem specifically exists in the host_aton function. The function fails to check the number of elements it stores in a fixed size array. The elements come from a user-controlled string and are passed into the program from a command line option.

tags | advisory, overflow, arbitrary, local
advisories | CVE-2005-0021
SHA-256 | 7c0cd7036f28d3c7e849872d9ef7b92e03c20512b1b2af8c6787af85d4cd56bc
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