Buffer overflow in Tor_project Tor
CVE-2017-8821
In Tor before 0.2.5.16, 0.2.6 through 0.2.8 before 0.2.8.17, 0.2.9 before 0.2.9.14, 0.3.0 before 0.3.0.13, and 0.3.1 before 0.3.1.9, an attacker can cause a denial of service (application hang) via crafted PEM input that signifies a public…
Vulnerability class: Buffer Overflow
EPSS: 0.005 (67.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Tor_project Tor
- Debian Debian_linux — versions 8.0, 9.0
- N/a Tor Before 0.2.5.16, 0.2.6 Through 0.2.8 0.2.8.17, 0.2.9 0.2.9.14, 0.3.0 0.3.0.13, And 0.3.1 0.3.1.9 — versions Tor before 0.2.5.16, 0.2.6 through 0.2.8 before 0.2.8.17, 0.2.9 before 0.2.9.14, 0.3.0 before 0.3.0.13, and 0.3.1 before 0.3.1.9
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@debian.org (x_refsource_CONFIRM, Vendor Advisory)
- security@debian.org (vendor-advisory, Third Party Advisory, x_refsource_DEBIAN)
- security@debian.org (x_refsource_CONFIRM, Vendor Advisory)
Frequently asked questions
- What is CVE-2017-8821?
- CVE-2017-8821 is a high-severity vulnerability in Tor_project Tor, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.5/10. Published 2017-12-03.
- How severe is CVE-2017-8821?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2017-8821 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.