CVE-2022-37451: Exim before 4.96 has an invalid free in pam_converse in auths/call_pam.c because store_free is not used after store_malloc

High severity · published Aug 6, 2022

CVE-2022-37451

Exim before 4.96 has an invalid free in pam_converse in auths/call_pam.c because store_free is not used after store_malloc

7.5

CVSS

3.3%

EPSS

On KEV

Description

Exim before 4.96 has an invalid free in pam_converse in auths/call_pam.c because store_free is not used after store_malloc.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack vector

Network

Complexity

Low

Privileges

None

User interaction

None

Confidentiality

None

Integrity

None

Availability

High

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)3.3% · higher than 88% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

Exim · Exim

before 4.96 · source: NVD

Fedora · Fedoraproject

35; 36 · source: NVD

Affected product

Exim

All Exim CVEs

References

NVD

https://nvd.nist.gov/vuln/detail/CVE-2022-37451

CVE.org

https://www.cve.org/CVERecord?id=CVE-2022-37451

Third Party Advisory

https://cwe.mitre.org/data/definitions/762.html

Patch

https://github.com/Exim/exim/commit/51be321b27825c01829dffd90f11bfff256f7e42

Release Notes

https://github.com/Exim/exim/compare/exim-4.95...exim-4.96

Release Notes

https://github.com/Exim/exim/wiki/EximSecurity

Exploit

https://github.com/ivd38/exim_invalid_free

Mailing List

https://lists.exim.org/lurker/message/20220625.141825.d6de6074.en.html