Out-of-bounds Read in Bufferlist Project
CVE-2020-8244
A buffer over-read vulnerability exists in bl <4.0.3, <3.0.1, <2.2.1, and <1.2.3 which could allow an attacker to supply user input (even typed) that if it ends up in consume() argument and can become negative, the BufferList state can be corrupted, tricking it into exposing uninitialized memory via regular .slice() calls.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L.
EPSS exploit prediction
EPSS: 0.022 (81.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 82nd percentile — 81.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.022 · newest: 0.022 · change: 0.000
Affected products
- Bufferlist Project
- Debian Linux — versions 9.0
- Bl — versions Fixed in 4.0.3, 3.0.1, 2.2.1, and 1.2.3
Weakness classification (CWE)
Public proof-of-concept exploits
References
- hackerone.com/reports/966347 (Exploit, Patch, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2021/06/msg00028.html (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-8244?
- CVE-2020-8244 is a medium-severity vulnerability in Bufferlist Project, classified under Buffer Over-read. CVSS score: 6.5/10. Published 2020-08-30.
- How severe is CVE-2020-8244?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2020-8244 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.