CVE-2022-37451
HIGHCVSS 7.5/10EPSS 2.55%
Last modified
CVE-2022-37451 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 2.55% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Exim | Exim | < 4.96 |
| Fedoraproject | Fedora | 35 |
| Fedoraproject | Fedora | 36 |
References
- https://cwe.mitre.org/data/definitions/762.htmlThird Party Advisory
- https://github.com/Exim/exim/commit/51be321b27825c01829dffd90f11bfff256f7e42Patch, Third Party Advisory
- https://github.com/Exim/exim/compare/exim-4.95...exim-4.96Release Notes, Third Party Advisory
- https://github.com/Exim/exim/wiki/EximSecurityRelease Notes, Third Party Advisory
- https://github.com/ivd38/exim_invalid_freeExploit, Patch, Third Party Advisory
- https://lists.exim.org/lurker/message/20220625.141825.d6de6074.en.htmlMailing List, Release Notes, Vendor Advisory
- https://www.exim.org/static/doc/security/Vendor Advisory
- https://www.openwall.com/lists/oss-security/2022/08/06/1Mailing List, Third Party Advisory
- https://cwe.mitre.org/data/definitions/762.htmlThird Party Advisory
- https://github.com/Exim/exim/commit/51be321b27825c01829dffd90f11bfff256f7e42Patch, Third Party Advisory
- https://github.com/Exim/exim/compare/exim-4.95...exim-4.96Release Notes, Third Party Advisory
- https://github.com/Exim/exim/wiki/EximSecurityRelease Notes, Third Party Advisory
- https://github.com/ivd38/exim_invalid_freeExploit, Patch, Third Party Advisory
- https://lists.exim.org/lurker/message/20220625.141825.d6de6074.en.htmlMailing List, Release Notes, Vendor Advisory
- https://www.exim.org/static/doc/security/Vendor Advisory
- https://www.openwall.com/lists/oss-security/2022/08/06/1Mailing List, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is 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.
How severe is CVE-2022-37451?
CVE-2022-37451 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.55% probability of exploitation in the next 30 days.
How do I fix CVE-2022-37451?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2022-37451?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST