Remote denial of service via salt length overflow
Published Oct 18, 2021 · Updated Aug 4, 2024
Integer overflow in strongSwan gmp plugin before 5.9.4 allows remote attackers to cause denial of service via crafted RSASSA-PSS certificates. The plugin stores an attacker-controlled salt length in a size_t field, allowing arithmetic wraparound to bypass a structure check and later drive memcpy into a segmentation fault. Exploitation requires the gmp plugin to be enabled and a certificate signature crafted with access to its signing key; the certificate need not be trusted, and remote code execution is not possible.
Summary
What happened
Integer overflow in strongSwan gmp plugin before 5.9.4 allows remote attackers to cause denial of service via crafted RSASSA-PSS certificates. The plugin stores an attacker-controlled salt length in a size_t field, allowing arithmetic wraparound to bypass a structure check and later drive memcpy into a segmentation fault. Exploitation requires the gmp plugin to be enabled and a certificate signature crafted with access to its signing key; the certificate need not be trusted, and remote code execution is not possible.
The record
- CVE
- CVE-2021-41990
- Published
- Oct 18, 2021
- Updated
- Aug 4, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-190, T1499
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Oct 18, 2021CVE publishedPublication date reported by the CVE source.
- Aug 4, 2024Record updatedLatest update available in the CVE record.
Exploitability
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What is affected?
Affected products and versions are unavailable in this record.
Published CVSS scores
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Attacks
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Public exploit references
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Technologies
Your stack
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Your stack
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