7.5

CVE-2017-3733: Encrypt-Then-Mac renegotiation crash

Modified
AliasesUBUNTU-CVE-2017-3733DEBIAN-CVE-2017-3733
Published 04-05-2017Last modified 16-09-2024

Vulnerability summary

CVE-2017-3733 is a high (CVSS 7.5) Improper Input Validation vulnerability in hp operations_agent. EPSS estimates a 12.87% chance of exploitation in the next 30 days, higher than 96.3% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 7.5 (NVD); no exploitation reported by the 5 checked sources; EPSS 13% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.0 (NVD)
EPSS score
12.87%
0%100%
Medium · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1
MGASA-2017-0390

Timeline

  1. 04-05-2017
    PublishedVulnerability first disclosed.
  2. 16-09-2024
    Last modifiedVulnerability information updated.

Description

During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL 1.1.0 before 1.1.0e to crash (dependent on ciphersuite). Both clients and servers are affected.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

12.87%

Chance of exploitation in the next 30 days

Percentile

96%

Versus all other CVEs

30-day change

No change 0.00 pp

From 12.87% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Debian1 product
  • openssl< 1.1.0e-1
Hp1 product
Openssl1 product
  • opensslEOLopenssl-1.1.0 | openssl-1.1.0a | openssl-1.1.0b | openssl-1.1.0c | openssl-1.1.0d | 1.1.0 | 1.1.0a | 1.1.0b | 1.1.0c | 1.1.0d
Ubuntu1 product
  • openssl< 1.0.1f-1ubuntu2.22 | < 1.0.2g-1ubuntu4.6

4 vendors · 4 products

References

11 links
Show all 11 references