Vulnerability in Exim
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.033 (87.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 87.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.033 · newest: 0.033 · change: 0.000
Affected products
- Exim
- Fedoraproject Fedora — versions 35, 36
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/Exim/exim/wiki/EximSecurity (Third Party Advisory, Release Notes)
- www.exim.org/static/doc/security/ (Vendor Advisory)
- github.com/ivd38/exim_invalid_free (Exploit, Patch, Third Party Advisory)
- www.openwall.com/lists/oss-security/2022/08/06/1 (Mailing List, Third Party Advisory)
- lists.exim.org/lurker/message/20220625.141825.d6de6074.en.html (Mailing List, Release Notes, Vendor Advisory)
- cwe.mitre.org/data/definitions/762.html (Third Party Advisory)
- github.com/Exim/exim/compare/exim-4.95...exim-4.96 (Third Party Advisory, Release Notes)
- github.com/Exim/exim/commit/51be321b27825c01829dffd90f11bfff256f7e42 (Patch, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
Frequently asked questions
- What is CVE-2022-37451?
- CVE-2022-37451 is a high-severity vulnerability in Exim, classified under Release of Invalid Pointer or Reference. CVSS score: 7.5/10. Published 2022-08-06.
- How severe is CVE-2022-37451?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2022-37451 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.