CVE-2021-27343

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-04-06 · updated 2026-06-17
Weakness: CWE-120

Description

SerenityOS Unspecified is affected by: Buffer Overflow. The impact is: obtain sensitive information (context-dependent). The component is: /Userland/Libraries/LibCrypto/ASN1/DER.h Crypto::der_decode_sequence() function. The attack vector is: Parsing RSA Key ASN.1.

Affected products

SerenityOS: all versions

References

https://github.com/SerenityOS/serenity/commit/48fbf6a88d4822a1e5470cf08f29464511bd72c1
https://github.com/SerenityOS/serenity/issues/5317
https://github.com/SerenityOS/serenity/pull/5344
https://github.com/SerenityOS/serenity/commit/48fbf6a88d4822a1e5470cf08f29464511bd72c1
https://github.com/SerenityOS/serenity/issues/5317
https://github.com/SerenityOS/serenity/pull/5344

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