Vulnerability in Fetchmail
CVE-2021-36386
report_vbuild in report.c in Fetchmail before 6.4.20 sometimes omits initialization of the vsnprintf va_list argument, which might allow mail servers to cause a denial of service or possibly have unspecified other impact via long error messages. NOTE: it is unclear whether use of Fetchmail on any realistic platform results in an impact beyond an inconvenience to the client user.
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: 0.026 (84.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 84.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.026 · newest: 0.026 · change: 0.000
Affected products
- Fetchmail
- Fedoraproject Fedora — versions 33, 34
Weakness classification (CWE)
References
- www.fetchmail.info/security.html (Vendor Advisory)
- www.openwall.com/lists/oss-security/2021/07/28/5 (Patch, Mailing List, Third Party Advisory)
- www.fetchmail.info/fetchmail-SA-2021-01.txt (Vendor Advisory)
- www.openwall.com/lists/oss-security/2021/08/09/1 (mailing-list, Mailing List)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- security.gentoo.org/glsa/202209-14 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-36386?
- CVE-2021-36386 is a high-severity vulnerability in Fetchmail, classified under CWE-909. CVSS score: 7.5/10. Published 2021-07-30.
- How severe is CVE-2021-36386?
- High severity. CVSS v3 base score is 7.5 out of 10.