Buffer overflow in Exim
CVE-2020-28010
Exim 4 before 4.94.2 allows Out-of-bounds Write because the main function, while setuid root, copies the current working directory pathname into a buffer that is too small (on some common platforms).
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (33.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 33.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28010-SLCWD.txt (Vendor Advisory)
- www.openwall.com/lists/oss-security/2021/07/22/7 (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-28010?
- CVE-2020-28010 is a high-severity vulnerability in Exim, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2021-05-06.
- How severe is CVE-2020-28010?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2020-28010 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.