Risk | Medium |
Patch available | YES |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2012-5671 |
CWE-ID | CWE-122 |
Exploitation vector | Network |
Public exploit | N/A |
Vulnerable software Subscribe |
Exim Server applications / Mail servers |
Vendor | Exim |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
EUVDB-ID: #VU43366
Risk: Medium
CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]
CVE-ID: CVE-2012-5671
CWE-ID:
CWE-122 - Heap-based Buffer Overflow
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in Heap-based buffer overflow in the dkim_exim_query_dns_txt function in dkim.c in Exim 4.70 through 4.80, when DKIM support is enabled and acl_smtp_connect and acl_smtp_rcpt are not set to "warn control = dkim_disable_verify,". A remote attacker can use an email from a malicious DNS server. to trigger heap-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
MitigationInstall update from vendor's website.
Vulnerable software versionsExim: 4.70 - 4.80
External linkshttp://lists.fedoraproject.org/pipermail/package-announce/2012-November/091664.html
http://lists.fedoraproject.org/pipermail/package-announce/2012-October/090900.html
http://lists.fedoraproject.org/pipermail/package-announce/2012-October/090963.html
http://lists.opensuse.org/opensuse-security-announce/2012-10/msg00018.html
http://osvdb.org/86616
http://secunia.com/advisories/51098
http://secunia.com/advisories/51115
http://secunia.com/advisories/51153
http://secunia.com/advisories/51155
http://www.debian.org/security/2012/dsa-2566
http://www.openwall.com/lists/oss-security/2012/10/26/5
http://www.securityfocus.com/bid/56285
http://www.ubuntu.com/usn/USN-1618-1
http://exchange.xforce.ibmcloud.com/vulnerabilities/79615
http://lists.exim.org/lurker/message/20121026.080330.74b9147b.en.html
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.