VulnerabilityModified
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 7.5EPSS 3.26%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.26%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 3.26% probability · 88th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-763
- Affected
- exim/exim · fedoraproject/fedora
- Source
- cve@mitre.org
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://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LETR5CVDPFOFQHXCJP6NFLG52JZHQYDY/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XSWDF4QEXD4TDWQLYQOWCHBJKTDQR4Z7/
- 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://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LETR5CVDPFOFQHXCJP6NFLG52JZHQYDY/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XSWDF4QEXD4TDWQLYQOWCHBJKTDQR4Z7/
- https://www.exim.org/static/doc/security/Vendor Advisory
- https://www.openwall.com/lists/oss-security/2022/08/06/1Mailing List, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.