Vulnerability in Rust-Lang Rust
CVE-2021-29922
library/std/src/net/parser.rs in Rust before 1.53.0 does not properly consider extraneous zero characters at the beginning of an IP address string, which (in some situations) allows attackers to bypass access control that is based on IP addresses, because of unexpected octal interpretation.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.
EPSS exploit prediction
EPSS: 0.026 (85.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 85.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.026 · newest: 0.026 · change: 0.000
Affected products
Public proof-of-concept exploits
References
- doc.rust-lang.org/beta/std/net/struct.Ipv4Addr.html (Vendor Advisory)
- github.com/rust-lang/rust/pull/83652 (Patch, Third Party Advisory)
- github.com/rust-lang/rust/issues/83648 (Exploit, Patch, Third Party Advisory, Issue Tracking)
- github.com/sickcodes/security/blob/master/advisories/SICK-2021-015.md (Exploit, Third Party Advisory)
- defcon.org/html/defcon-29/dc-29-speakers.html (Third Party Advisory)
- security.gentoo.org/glsa/202210-09 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-29922?
- CVE-2021-29922 is a critical-severity vulnerability in Rust-Lang Rust. CVSS score: 9.1/10. Published 2021-08-07.
- How severe is CVE-2021-29922?
- Critical severity. CVSS v3 base score is 9.1 out of 10.
- Is CVE-2021-29922 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.