Out-of-bounds Read in GNU Libmicrohttpd
CVE-2023-27371
GNU libmicrohttpd before 0.9.76 allows remote DoS (Denial of Service) due to improper parsing of a multipart/form-data boundary in the postprocessor.c MHD_create_post_processor() method. This allows an attacker to remotely send a malicious HTTP POST packet that includes one or more '\0' bytes in a multipart/form-data boundary field, which - assuming a specific heap layout - will result in an out-of-bounds read and a crash in the find_boundary() function.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.013 (68.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 68.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000
Affected products
Weakness classification (CWE)
References
- git.gnunet.org/libmicrohttpd.git/commit/ (Patch)
- github.com/0xhebi/CVEs/tree/main/GNU Libmicrohttpd (Exploit, Third Party Advisory)
- lists.gnu.org/archive/html/libmicrohttpd/2023-02/msg00000.html (Mailing List)
- lists.debian.org/debian-lts-announce/2023/03/msg00029.html (mailing-list)
Frequently asked questions
- What is CVE-2023-27371?
- CVE-2023-27371 is a medium-severity vulnerability in GNU Libmicrohttpd, classified under Out-of-bounds Read. CVSS score: 5.9/10. Published 2023-02-28.
- How severe is CVE-2023-27371?
- Medium severity. CVSS v3 base score is 5.9 out of 10.