Vulnerability in Connect2id Nimbus Jose\+jwt
CVE-2017-12972
In Nimbus JOSE+JWT before 4.39, there is no integer-overflow check when converting length values from bytes to bits, which allows attackers to conduct HMAC bypass attacks by shifting Additional Authenticated Data (AAD) and ciphertext so that different plaintext is obtained for the same HMAC.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.009 (59.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 59.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
- Connect2id Nimbus Jose\+jwt — versions 1.0, 1.1, 1.2
Weakness classification (CWE)
References
- bitbucket.org/connect2id/nimbus-jose-jwt/issues/224/byte-to-bit-overflow-in-cbc (Patch, Third Party Advisory)
- bitbucket.org/connect2id/nimbus-jose-jwt/commits/0d2bd649ea386539220d4facfe1f65… (Third Party Advisory)
- bitbucket.org/connect2id/nimbus-jose-jwt/src/master/CHANGELOG.txt (Third Party Advisory, Release Notes)
- lists.apache.org/thread.html/9317fd092b257a0815434b116a8af8daea6e920b6673f4fd55… (mailing-list)
Frequently asked questions
- What is CVE-2017-12972?
- CVE-2017-12972 is a high-severity vulnerability in Connect2id Nimbus Jose\+jwt, classified under Insufficient Verification of Data Authenticity. CVSS score: 7.5/10. Published 2017-08-20.
- How severe is CVE-2017-12972?
- High severity. CVSS v3 base score is 7.5 out of 10.