Published: 06/05/2021 Updated: 10/05/2021

CVSS v2 Base Score: 7.2 | Impact Score: 10 | Exploitability Score: 3.9

CVSS v3 Base Score: 7.8 | Impact Score: 5.9 | Exploitability Score: 1.8

VMScore: 641

Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C

Exim 4 prior to 4.94.2 allows Integer Overflow to Buffer Overflow because get_stdinput allows unbounded reads that are accompanied by unbounded increases in a certain size variable. NOTE: exploitation may be impractical because of the execution time needed to overflow (multiple days).

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exim exim

The Qualys Research Labs reported several vulnerabilities in Exim, a mail transport agent, which could result in local privilege escalation and remote code execution Details can be found in the Qualys advisory at wwwqualyscom/2021/05/04/21nails/21nailstxt For the stable distribution (buster), these problems have been fixed in version 4 ...

Exim 4 before 4942 allows Execution with Unnecessary Privileges Because Exim operates as root in the log directory (owned by a non-root user), a symlink or hard link attack allows overwriting critical root-owned files anywhere on the filesystem (CVE-2020-28007) Exim 4 before 4942 allows Execution with Unnecessary Privileges Because Exim oper ...

An integer overflow in get_stdinput() has been found in Exim before version 4942 ...

CWE-190 https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28009-STDIN.txt https://nvd.nist.gov https://www.debian.org/security/2021/dsa-4912

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CVE-2020-28009

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