Vulnerability HighRUSTSEC-2021-0057 · openssl-src
RUSTSEC-2021-0057: Integer overflow in CipherUpdate
Short answerA security vulnerability in the openssl-src crate: Integer overflow in CipherUpdate. High severity (CVSS 7.5). Fixed in 111.14.0: update to a fixed version.
| Crate | openssl-src |
|---|---|
| Type | Vulnerability (denial-of-service) |
| Affected versions | Before 111.14.0. |
| Fixed in | 111.14.0 |
| Severity | High, CVSS 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| Published | 2021-05-01 |
| Last changed | 2024-12-16 |
| Also known as | BIT-node-2021-23840, BIT-node-min-2021-23840, CVE-2021-23840, GHSA-qgm6-9472-pwq7 |
What to do
- See which version you have:
cargo tree -i openssl-src(it also shows which of your dependencies pulls it in). - Update within your version requirement:
cargo update -p openssl-src. If the fix is a newer major or minor than your requirement allows, raise it in Cargo.toml (for exampleopenssl-src = "111.14.0") or update the dependency that pulls it in. - Check again with
cargo audit, or paste your Cargo.lock into our Cargo.toml checker.
Details from the advisory
Calls to EVP_CipherUpdate, EVP_EncryptUpdate and EVP_DecryptUpdate may overflow the output length argument in some cases where the input length is close to the maximum permissable length for an integer on the platform. In such cases the return value from the function call will be 1 (indicating success), but the output length value will be negative. This could cause applications to behave incorrectly or crash.
References
- Package: crates.io/crates/openssl-src
- Advisory: rustsec.org/advisories/RUSTSEC-2021-0057.html
- Web: www.openssl.org/news/secadv/20210216.txt
From the RustSec Advisory Database (CC0-1.0) via the OSV export, downloaded Oct 24, 2026. Severity score computed from the published CVSS vector.
Other advisories for openssl-src
- Vulnerability HighRUSTSEC-2020-0015 · 2020-04-25Crash causing Denial of Service attack
- Vulnerability MediumRUSTSEC-2021-0055 · 2021-05-01NULL pointer deref in signature_algorithms processing
- Vulnerability HighRUSTSEC-2021-0056 · 2021-05-01CA certificate check bypass with X509_V_FLAG_X509_STRICT
- Vulnerability MediumRUSTSEC-2021-0058 · 2021-05-01Null pointer deref in `X509_issuer_and_serial_hash()`
- Vulnerability CriticalRUSTSEC-2021-0097 · 2021-08-24SM2 Decryption Buffer Overflow
- Vulnerability HighRUSTSEC-2021-0098 · 2021-08-24Read buffer overruns processing ASN.1 strings
- VulnerabilityRUSTSEC-2021-0129 · 2021-12-14Invalid handling of `X509_verify_cert()` internal errors in libssl
- VulnerabilityRUSTSEC-2022-0014 · 2022-03-15Infinite loop in `BN_mod_sqrt()` reachable when parsing certificates
Up next
Same crateopenssl-src: security historyEvery advisory for this crate, and whether it is safe to use today.Read it next →Did this answer your question?