SumatraPDF Update MITM -> Arbitrary Code Execution
41Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 7.5epss 0.4%
from disclosure to weapon80 days
Published on NVDFeb 9
1st PoC+80d
exploitation probability
0.4%top 63% of all CVEs
observed exploitation
nono source reports it
1 public exploit(s)
SumatraPDF is a multi-format reader for Windows. In 3.5.0 through 3.5.2, SumatraPDF's update mechanism disables TLS hostname verification (INTERNET_FLAG_IGNORE_CERT_CN_INVALID) and executes installers without signature checks. A network attacker with any valid TLS certificate (e.g., Let's Encrypt) can intercept the update check request, inject a malicious installer URL, and achieve arbitrary code execution.
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected products
sumatrapdfreader · sumatrapdfpublic PoCs found — 1
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