NULL pointer dereference in Microsoft Windows
CVE-2020-26235
In Rust time crate from version 0.2.7 and before version 0.2.23, unix-like operating systems may segfault due to dereferencing a dangling pointer in specific circumstances. This requires the user to set any environment variable in a different thread than the affected functions. The affected functions are time::UtcOffset::local_offset_at, time::UtcOffset::try_local_offset_at, time::UtcOffset::current_local_offset, time::UtcOffset::try_current_local_offset, time::OffsetDateTime::now_local and time::OffsetDateTime::try_now_local. Non-Unix targets are unaffected. This includes Windows and wasm. The issue was introduced in version 0.2.7 and fixed in version 0.2.23.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.016 (75.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 75.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000
Affected products
- Microsoft Windows
- Time Project
- Time-Rs Time — versions >= 0.2.7, <0.2.23
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/time-rs/time/security/advisories/GHSA-wcg3-cvx6-7396 (Patch, Third Party Advisory)
- github.com/time-rs/time/issues/293 (Third Party Advisory, Issue Tracking)
- crates.io/crates/time/0.2.23 (Release Notes, Vendor Advisory)
Frequently asked questions
- What is CVE-2020-26235?
- CVE-2020-26235 is a medium-severity vulnerability in Microsoft Windows, classified under NULL Pointer Dereference. CVSS score: 5.3/10. Published 2020-11-24.
- How severe is CVE-2020-26235?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2020-26235 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.