CVE-2017-1000430
Integer overflow in base64
rust-base64 version <= 0.5.1 is vulnerable to a buffer overflow when calculating the size of a buffer to use when encoding base64 using the 'encode_config_buf' and 'encode_config' functions
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
9.8
rust-base64 version <= 0.5.1 is vulnerable to a buffer overflow when calculating the size of a buffer to use when encoding base64 using the 'encode_config_buf' and 'encode_config' functions
- Record
CVE-2017-1000430- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-119
- Updated
- 2026-11-02
CVE List No score
rust-base64 version <= 0.5.1 is vulnerable to a buffer overflow when calculating the size of a buffer to use when encoding base64 using the 'encode_config_buf' and 'encode_config' functions
- Record
CVE-2017-1000430- Updated
- 2026-11-02
EUVDEUVD-2021-1929 No score
rust-base64 version <= 0.5.1 is vulnerable to a buffer overflow when calculating the size of a buffer to use when encoding base64 using the 'encode_config_buf' and 'encode_config' functions
- Record
EUVD-2021-1929- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-x67x-vg9m-65c3
9.8
Integer overflow in base64
Affected versions of this crate suffered from an integer overflow bug when
calculating the size of a buffer to use when encoding base64 using the
encode_config_buf and encode_config functions. If the input string
was large, this would cause a buffer to be allocated that was too small.
Since this function writes to the buffer using unsafe code, it would
allow an attacker to write beyond the buffer, causing memory corruption
and possibly the execution of arbitrary code.
This flaw was corrected by using checked arithmetic to calculate the size of the buffer.
- Record
GHSA-x67x-vg9m-65c3- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-119
- Updated
- 2026-11-02
OSV
9.8
rust-base64 version <= 0.5.1 is vulnerable to a buffer overflow when calculating the size of a buffer to use when encoding base64 using the 'encode_config_buf' and 'encode_config' functions
- Record
CVE-2017-1000430- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVGHSA-x67x-vg9m-65c3
9.8
Integer overflow in base64
Affected versions of this crate suffered from an integer overflow bug when
calculating the size of a buffer to use when encoding base64 using the
encode_config_buf and encode_config functions. If the input string
was large, this would cause a buffer to be allocated that was too small.
Since this function writes to the buffer using unsafe code, it would
allow an attacker to write beyond the buffer, causing memory corruption
and possibly the execution of arbitrary code.
This flaw was corrected by using checked arithmetic to calculate the size of the buffer.
- Record
GHSA-x67x-vg9m-65c3- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-119
- Updated
- 2026-11-02
OSVRUSTSEC-2017-0004
9.8
Integer overflow leads to heap-based buffer overflow in encode_config_buf
Affected versions of this crate suffered from an integer overflow bug when
calculating the size of a buffer to use when encoding base64 using the
encode_config_buf and encode_config functions. If the input string
was large, this would cause a buffer to be allocated that was too small.
Since this function writes to the buffer using unsafe code, it would
allow an attacker to write beyond the buffer, causing memory corruption
and possibly the execution of arbitrary code.
This flaw was corrected by using checked arithmetic to calculate the size of the buffer.
- Record
RUSTSEC-2017-0004- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Affected products
Affected packages
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2017-1000430 is a critical vulnerability (CVSS 9.8) in Rust-base64 Project Rust-base64, published May 3, 2017. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.53%, the 74th percentile. Fixed in base64 0.5.2.
References
github.com/RustSec/advisory-db/blob/master/crates/base64/RUSTSEC-2017-0004.toml
nvd.nist.gov/vuln/detail/CVE-2017-1000430
github.com/alicemaz/rust-base64/commit/24ead980daf11ba563e4fb2516187a56a71ad319
rustsec.org/advisories/RUSTSEC-2017-0004.html
github.com/advisories/GHSA-x67x-vg9m-65c3
github.com/alicemaz/rust-base64
crates.io/crates/base64